射频消融术治疗的心房颤动患者血清N-乙酰神经氨酸、硫酸吲哚酚与3类标志物的相关性及与术后复发的关系

目的探讨行射频消融术治疗的心房颤动患者血清N-乙酰神经氨酸(Neu5Ac)、硫酸吲哚酚(IS)与炎症标志物、心房纤维化标志物、心肌损伤标志物的相关性及其与术后复发的关系。方法将2020年2月至2021年5月于大庆龙南医院行射频消融术治疗的AF患者156例纳入研究作为AF组。另外,选取100例同期体检健康者作为对照组。检测并比较两组血清Neu5Ac、IS、炎症标志物[超敏C反应蛋白(hs-CRP)、白细胞介素6(IL-6)]、心房纤维化标志物[Ⅰ型胶原羧基端前肽(PⅠCP)、Ⅲ型胶原前多肽(PⅢNP)、基质金属蛋白酶-1(MMP-1)、组织型基质金属蛋白酶抑制因子-1(TIMP-1)、透明质酸(HA)、层黏连蛋白(LN)]及心肌损伤标志物[肌红蛋白(MYO)、心肌肌钙蛋白I(cTnI)、肌酸激酶同工酶(CK-MB)]水平。采用Pearson相关分析血清Neu5Ac、IS与炎症标志物、心房纤维化标志物及心肌损伤标志物水平的相关性。术后对AF患者进行随访,根据1年内的复发情况将纳入研究的患者分为复发组和未复发组,比较两组临床资料及各项标志物。采用多因素Logistic回归分析AF患者射频消融术后复发的危险因素。结果AF组血清Neu5Ac、IS水平高于对照组(P<0.05)。AF组血清hs-CRP、IL-6、PⅠCP、PⅢNP、MMP-1、TIMP-1、HA、LN、MYO、cTnI、CK-MB水平高于对照组(P<0.05)。Pearson相关分析显示:血清Neu5Ac、IS与hs-CRP、IL-6、PⅠCP、PⅢNP、MMP-1、TIMP-1、HA、LN、MYO、cTnI、CK-MB水平均呈正相关(P<0.05)。随访结果显示:患者术后复发42例,复发率为26.92%(42/156)。复发组与未复发组病程、AF类型、QRS时限(QRSd)值、左房内径、左室射血分数、左房容积指数及血清Neu5Ac、IS、hs-CRP、IL-6、PⅠCP、PⅢNP、MMP-1、TIMP-1、HA、LN、MYO、cTnI、CK-MB水平比较差异有统计学意义(P<0.05)。多因素Logistic回归分析显示:血清Neu5Ac、IS、hs-CRP、IL-6、PⅠCP、MMP-1、HA、MYO、cTnI、CK-MB水平升高均为AF患者术后复发的危险因素(P<0.05)。结论行射频消融术治疗的AF患者血清Neu5Ac、IS水平升高,与炎症标志物、心房纤维化及心肌损伤标志物水平呈正相关,是患者术后复发的危险因素。

Study of coastal water zone ecosystem health in Zhejiang Province based on remote sensing data and GIS

The coastal ecosystem health assessment is a field of increasing importance.In this paper,a preliminary assessment of ecosystem health in Zhejiang coastal water zone was made,mainly based on remote sensing data and GIS technique.Its spatial and quantitative evaluation was facilitated by the progress of remote sensing and GIS technique development.Firstly,human activities,hydrology and ecosystem problems in the study area were discussed and analyzed.Secondly,from 4 aspects of human stress,physical,chemical and biological responses to anthropogenic activities and natural stress,several indicators such as water transparency(Secchi Disk Depth,SDD),suspended substance concentration,dissolved inorganic nitrogen,active phosphate,chlorophyll,harmful algae bloom,as well as distribution of sewage,sea lanes and port were employed.Thirdly,the Analytic Hierarchical Process was used for indicator weight calculation,and the ecosystem health criteria were established according to the integrative analysis of national water quality criteria,similar coastal ecosystem health research in other places or data inherent properties.The results indicated that from 2005 to 2007 the coastal water ecosystem health value in Zhejiang Province was unhealthy and needs ecological restoration by human intervention.

The black water around the Changjiang (Yangtze) Estuary in the spring of 2003

The Changjiang (Yangtze) Estuary is located in the East China Sea shelf with shallow water. Affected by the tide mixing and the runoff of the Changjiang River and the Qiantang River, the turbidity is very high. Generally, the water-leaving radiance is high in the turbid water because of the large particle scattering. Based on the in-situ data and ocean color remote sensing data of SeaWiFS, it was found that there was a black water region with the normalized water-leaving radiances less than 0.5 mW/(cm2·μm2·sr). The optical principle of the occurrence of this black water was analyzed by the inherent optical properties and the ocean color components. The results show that black water is caused by the relative low values of the suspended particle matter concentration and the back scattering ratio. In the black water region, the percentage of the phytoplankton absorption was relatively high, and the large size of the phytoplankton caused the low value of the particle backscattering ratio.

The satellite reversion of dissolved organic carbon (DOC) based on the analysis of the mixing behavior of DOC and colored dissolved organic matter: the East China Sea as an example

The retrieval of dissolved organic carbon (DOC) distribution by remote sensing is mainly based on the empirical relationship of DOC concentration and colored dissolved organic matter (CDOM) concentration in many literatures. To investigate the nature of this relationship, the distributions and mixing behaviors of DOC and CDOM are reviewed in the world's major estuaries and bays. It is found that, generally, the CDOM concentration is well correlated with the salinity in most estuaries, while DOC usually shows a nonconservative behavior which leads to a weak correlation between the DOC concentration and the CDOM concentration. To establish a good satellite reversion of the DOC concentration, the East China Sea(ECS) was taken as an example, and the mixing behavior of DOC and CDOM as well as the influence of biogeochemical processes were analyzed except for the physical mixing process with the data from late autumn (November, 2010) and winter (December, 2009) cruises. In the two ECS cruises, the CDOM concentration was found to be tightly correlated with the salinity, influenced little by the photochemical or biological processes. The data from the winter cruise show that DOC followed a conservative mixing along the salinity gradient, while in the late autumn cruise it was significantly affected by the biological activities, resulting in a poor correlation between the DOC and the CDOM. Accordingly, an improved DOC algorithm (CSDM) was proposed: when the biological influence was significant (Chl a greater than 0.8 μg/dm3 ), DOC was retrieved by the conservative and biological model, and if the conservative mixing was dominant (Chl a less than 0.8 μg/dm3 ), the direct DOC concentration and CDOM concentration relationship was used. Based on the proposed algorithm, a reasonable DOC distribution for the ECS from satellite was obtained in this study, and the proposed method can be applied to the other large river-dominant marginal sea.

Introduction to the airborne marine surveillance platform and its application to water quality monitoring in China

China Marine Surveillance Force was equipped with modern aerial equipments for marine law-execute with the advantage of functioning agilely at a large scale of surveillance coverage,providing powerful all-round safeguard,which is of benefit to the harmonious and sustainable development of coastal economy.Onboard the planes,three kinds of remote sensing sensors have been installed,including a marine airborne multi-spectrum scanner(MAMS),an optical-electronic platform,and an airborne hyper-spectral system AISA+.The specifications of remote sensing platforms were introduced briefly first,then examples of water quality monitoring by airborne remote sensing were presented,including the monitoring in coastal suspended material,oil-spill and abnormal warm water,etc.

Improving the wind and wave estimation of dual-frequency altimeter JASON1 in Typhoon Shanshan and considering the rain effects

Altimetry data have been widely used in various fields of oceanography,including the extreme weather events such as tropical cyclones,typhoons,and hurricanes. The performance of JASON1 in Typhoon Shanshan is assessed by examining the sensor geophysical data record and illustrates how the measured return waveform,significant wave height,and backscatter are all affected by various factors associated with the typhoon,with details by the rain are illustrated. The correction method to maintain accurate wave height and wind speed measurements in Typhoon Shanshan and the results are presented. Furthermore,the additional results of rain rate and typhoon eye diameter can be retrieved. Because of the lack of in-situ measurements of wind,wave,and rain rate at Typhoon Shanshan,results are compared with the forecasted typhoon data and a good agreement is found.

A general purpose exact Rayleigh scattering look-up table for ocean color remote sensing

The current exact Rayleigh scattering calculation of ocean color remote sensing uses the look-up table (LUT), which is usually created for a special remote sensor and cannot be applied to other sensors. For practical application, a general purpose Rayleigh scattering LUT which can be applied to all ocean color remote sensors is generated. An adding-doubling method to solve the vector radiative transfer equation in the plane-parallel atmosphere is deduced in detail. Compared with the exact Rayleigh scattering radiance derived from the MODIS exact Rayleigh scattering LUT, it is proved that the relative error of Rayleigh scattering calculation with the adding-doubling method is less than 0.25%, which meets the required accuracy of the atmospheric correction of ocean color remote sensing. Therefore, the adding-doubling method can be used to generate the exact Rayleigh scattering LUT for the ocean color remote sensors. Finally, the general purpose exact Rayleigh scattering LUT is generated using the adding-doubling method. On the basis of the general purpose LUT, the calculated Rayleigh scattering radiance is tested by comparing with the LUTs of MODIS, SeaWiFS and the other ocean color sensors, showing that the relative errors are all less than 0.5%, and this general purpose LUT can be applied to all ocean color remote sensors.

基于Himawari-8数据的夜间海雾识别

海雾是一种发生在海面的灾害性天气现象,掌握海雾的分布与生消变化,能有效地减少海雾带来的危害。卫星遥感观测具有近实时、大范围覆盖、连续观测等特点,特别是高时间分辨率的静止卫星观测系统,能够对海雾的发生−发展−消亡过程进行动态跟踪观测。本文以2018‒2019年黄、渤海发生的海雾事件为样例,利用日本静止气象卫星Himawari-8(H-8)红外辐射数据,分析海雾的多通道红外亮温辐射特性,通过不同波段差和波段比组合,定义海雾和晴空水体分离指数、海雾和一般云系分离指数、多通道亮温差斜率指数以及中红外亮温纹理指数,提出基于多指数概率分布的夜间海雾监测算法;算法分别应用于H-8和韩国静止气象卫星GEO-KOMPSAT2A(GK-2A)数据,对2020年2‒6月发生的6次海雾事件多时次卫星观测识别出的海雾位置分布和覆盖面积进行对比实现互验证,结果表明,本文提出的夜间海雾监测算法能有效地实现夜间海雾的识别;选择2020年4月29日夜间H-8和GK-2A每10 min一次连续观测数据的监测结果,对海雾的发生区域进行跟踪分析,清晰地展现出此次海雾事件的发生、发展演变过程,说明算法能清楚地监测出各时段海雾的分布,跟踪海雾的发展变化,可为海上大雾的防灾减灾提供科学依据和决策基础。

A new algorithm based on the background field for red tide monitoring in the East China Sea

Remote sensing has been proven to be an effective means of monitoring red tides. The spectral information is an important basis for establishing a model to monitor red tides. The spectral curves of red tide events are analyzed and compared with multiyear monthly averaged spectral curves based on MODIS data from July 2002 to June 2012, as well as spectral differences at the same location during red tide presence and absence. A red tide monitoring algorithm is developed based on the background field to extract the red tide information of the East China Sea(ECS). With the application of the algorithm in the ECS, the results reveal that the developed model can effectively determine the location of red tides, with good correspondence to the results from an official bulletin. This demonstrates that the algorithm can effectively extract the red tide information.

Optical detection of Prorocentrum donghaiense blooms based on multispectral reflectance

Prorocentrum donghaiense is one of the most common red tide causative dinoflagellates in the Changjiang(Yangtze)River Estuary and the adjacent area of the East China Sea.It causes large-scale blooms in late spring and early summer that lead to widespread ecologic and economic damage.A means for distinguishing dinoflagellate blooms from diatom(Skeletonema costatum)blooms is desired.On the basis of measurements of remote sensing reflectance[Rrs(λ)]and inherent optical parameters,the potential of using a multispectral approach is assessed for discriminating the algal blooms due to P.donghaiense from those due to S.costatum.The behavior of two reflectance ratios[R1=Rrs(560)/Rrs(532)and R2=Rrs(708)/Rrs(665)],suggests that differentiation of P.donghaiense blooms from diatom bloom types is possible from the current band setup of ocean color sensors.It is found that there are two reflectance ratio regimes that indicate a bloom is dominated by P.donghaiense:(1)R1>1.55 and R2<1.0 or(2)R1>1.75 and R21.0.Various sensitivity analyses are conducted to investigate the effects of the variation in varying levels of chlorophyll concentration and colored dissolved organic matter(CDOM)as well as changes in the backscattering ratio(bbp/bp)on the efficacy of this multispectral approach.Results indicate that the intensity and inherent optical properties of the algal species explain much of the behavior of the two ratios.Although backscattering influences the amplitude of Rrs(λ),especially in the 530 and 560 nm bands,the discrimination between P.donghaiense and diatoms is not significantly affected by the variation of bbp/bp.Since aCDOM(440)in coastal areas of the ECS is typically lower than 1.0 m 1in most situations,the presence of CDOM does not interfere with this discrimination,even as SCDOM varies from 0.01 to 0.026 nm 1.Despite all of these effects,the discrimination of P.donghaiense blooms from diatom blooms based on multispectral measurements of Rrs(λ)is feasible.

Upper ocean responses to category 5 typhoon Megi in the western north Pacific

Category 5 typhoon Megi was the most intense typhoon in 2010 of the world. It lingered in the South China Sea (SCS) for 5 d and caused a significant phytoplankton bloom detected by the satellite image. In this study, the authors investigated the ocean biological and physical responses to typhoon Megi by using chlorophyll-a (chl-a) concentration, sea surface temperature (SST), sea surface height anomaly (SSHA), sea surface wind measurements derived from different satellites and in situ data. The chl-a concentration (>3 mg/m 3 ) increased thirty times in the SCS after the typhoon passage in comparison with the mean level of October averaged from 2002 to 2009. With the relationship of wind stress curl and upwelling, the authors found that the speed of upwelling was over ten times during typhoon than pre-typhoon period. Moreover, the mixed layer deepened about 20 m. These reveal that the enhancement of chl-a concentration was triggered by strong vertical mixing and upwelling. Along the track of typhoon, the maximum sea surface cooling (6-8 C) took place in the SCS where the moving speed of typhoon was only 1.4-2.8 m/s and the mixed layer depth was about 20 m in pre-typhoon period. However, the SST drop at the east of the Philippines is only 1-2 C where the translation speed of typhoon was 5.5-6.9 m/s and the mixed layer depth was about 40 m in pre-typhoon period. So the extent of the SST drop was probably due to the moving speed of typhoon and the depth of the mixed layer. In addition, the region with the largest decline of the sea surface height anomaly can indicate the location where the maximum cooling occurs.

The proportions and variations of the light absorption coefficients of major ocean color components in the East China Sea

The East China Sea (ECS),one of the largest continental seas,has dynamic hydrology and complex optical characteristics that make ocean color remote-sensing retrieval difficult.The distributions and proportions of the light absorption coefficients of major ocean color components based on two large-scale investigations in the ECS are presented,showing these features in typical summer and winter seasons.The absorption coefficient a CDOM,a NAP and a phy of colored dissolved organic matter,non-algal particle,and pigment of phytoplankton show a decreasing trend from the coast to the outer shelf.According to the a CDOM distribution at 440 nm,the Changjiang River plume shows an abnormal southeastward transport.An extremely high a NAP value patch at 440 nm is present in the middle coast.The chlorophyll-a-specific phytoplankton pigment absorption (a phy) is much higher in winter than in summer,which may cause serious underestimated results when applying the averaged a phy into remote-sensing algorithms for chlorophyll concentration retrieval.The importance of phytoplankton size was evident in outer shelf waters.The absorption of a CDOM (440) is a dominant component accounting for over half of the total seawater absorption in summer.The a NAP (440) accounts for 64% of the absorption of the ECS coastal area in winter.

Satellite remote sensing of ultraviolet irradiance on the ocean surface

Ultraviolet(UV) radiation has a significant influence on marine biological processes and primary productivity;however, the existing ocean color satellite sensors seldom contain UV bands. A look-up table of wavelengthintegrated UV irradiance(280–400 nm) on the sea surface is established using the coupled ocean atmosphere radiative transfer(COART) model. On the basis of the look-up table, the distributions of the UV irradiance at middle and low latitudes are inversed by using the satellite-derived atmospheric products from the Aqua satellite,including aerosol optical thickness at 550 nm, ozone content, liquid water path, and the total precipitable water.The validation results show that the mean relative difference of the 10 d rolling averaged UV irradiance between the satellite retrieval and field observations is 8.20% at the time of satellite passing and 13.95% for the daily dose of UV. The monthly-averaged UV irradiance and daily dose of UV retrieved by satellite data show a good correlation with the in situ data, with mean relative differences of 6.87% and 8.43%, respectively. The sensitivity analysis of satellite inputs is conducted. The liquid water path representing the condition of cloud has the highest effect on the retrieval of the UV irradiance, while ozone and aerosol have relatively lesser effect. The influence of the total precipitable water is not significant. On the basis of the satellite-derived UV irradiance on the sea surface, a preliminary simple estimation of ultraviolet radiation's effects on the global marine primary productivity is presented, and the results reveal that ultraviolet radiation has a non-negligible effect on the estimation of the marine primary productivity.

Review and suggestions for estimating particulate organic carbon and dissolved organic carbon inventories in the ocean using remote sensing data

Dissolved organic carbon(DOC)and particulate organic carbon(POC)are basic variables for the ocean carbon cycle.Knowledge of the distribution and inventory of these variables is important for a better estimation and understanding of the global carbon cycle.Owing to its considerable advantages in spatial and temporal coverage,remote sensing data provide estimates of DOC and POC inventories,which are able to give a synthetic view for the distribution and transportation of carbon pools.To estimate organic carbon inventories using remote sensing involves integration of the surface concentration and vertical profile models,and the development of these models is critical to the accuracy of estimates.Hence,the distribution and control factors of DOC and POC in the ocean first are briefly summarized,and then studies of DOC and POC inventories and flux estimations are reviewed,most of which are based on field data and few of which consider the vertical distributions of POC or DOC.There is some research on the estimation of POC inventory by remote sensing,mainly in the open ocean,in which three kinds of vertical profile models have been proposed:the uniform,exponential decay,and Gauss models.However,research on remote-sensing estimation of the DOC inventory remains lacking.A synthetic review of approaches used to estimate the organic carbon inventories is offered and the future development of methods is discussed for such estimates using remote sensing data in coastal waters.

Measurements of ocean wave spectrum from airborne radar at small incidence angles

This paper proposes the retrieval method of ocean wave spectrum for airborne radar observations at small incidence angles,which is slightly modified from the method developed by Hauser.Firstly,it makes use of integration method to estimate total mean square slope instead of fitting method,which aims to reduce the affects of fluctuations superposed on normalized radar cross-section by integration.Secondly,for eliminating the noise spectrum contained in signal spectrum,the method considers the signal spectrum in certain look direction without any long wave components as the assumed noise spectrum,which would be subtracted from signal spectrum in any look direction for linear wave spectrum retrieval.Estimated ν from the integration method are lower than the one from fitting method and have a standard deviation of 0.004 between them approximately.The assumed noise spectrum energy almost has no big variations along with the wave number and is slightly lower to the high wave number part of signal spectrum in any look direction,which follows that the assumption makes sense.The retrieved directional spectra are compared with the buoy records in terms of peak wavelength,peak direction and the significant wave height.Comparisons show that the retrieved peak wavelength and significant wave height are slightly higher than the buoy records but don't differs significantly (error less than 10%).For peak direction,the swell waves in first case basically propagate in the wind direction 6 hours ago and the wind-generated waves in second case also propagate in the wind direction,but the 180° ambiguity remains.Results show that the modified method can carry out the retrieval of directional wave spectrum.

Reconstruction of incomplete satellite SST data sets based on EOF method

As for the satellite remote sensing data obtained by the visible and infrared bands inversion, the clouds coverage in the sky over the ocean often results in missing data of inversion products on a large scale, and thin clouds di?cult to be detected would cause the data of the inversion products to be abnormal. Alvera et al.(2005) proposed a method for the reconstruction of missing data based on an Empirical Orthogonal Functions (EOF) decomposition, but his method couldn’t process these images presenting extreme cloud coverage(more than 95%), and required a long time for recon- struction. Besides, the abnormal data in the images had a great effect on the reconstruction result. Therefore, this paper tries to improve the study result. It has reconstructed missing data sets by twice applying EOF decomposition method. Firstly, the abnormity time has been detected by an- alyzing the temporal modes of EOF decomposition, and the abnormal data have been eliminated. Secondly, the data sets, excluding the abnormal data, are analyzed by using EOF decomposition, and then the temporal modes undergo a filtering process so as to enhance the ability of reconstruct- ing the images which are of no or just a little data, by using EOF. At last, this method has been applied to a large data set, i.e. 43 Sea Surface Temperature (SST) satellite images of the Changjiang River (Yangtze River) estuary and its adjacent areas, and the total reconstruction root mean square error (RMSE) is 0.82°C. And it has been proved that this improved EOF reconstruction method is robust for reconstructing satellite missing data and unreliable data.

SST diurnal warming in the China seas and northwestern Pacific Ocean using MTSAT satellite observations

Hourly sea surface temperature(SST) observations from the geostationary satellite are increasingly used in studies of the diurnal warming of the surface oceans. The aim of this study is to derive the spatial and temporal distribution of diurnal warming in the China seas and northwestern Pacific Ocean from Multi-functional Transport Satellite(MTSAT) SST. The MTSAT SST is validated against drifting buoy measurements firstly. It shows mean biases is about –0.2°C and standard deviation is about 0.6°C comparable to other satellite SST accuracy. The results show that the tropics, mid-latitudes controlled by subtropical high and marginal seas are frequently affected by large diurnal warming. The Kuroshio and its extension regions are smaller compared with the surrounding regions. A clear seasonal signal, peaking at spring and summer can be seen from the long time series of diurnal warming in the domain in average. It may due to large insolation and low wind speed in spring and summer, while the winter being the opposite. Surface wind speed modulates the amplitude of the diurnal cycle by influencing the surface heat flux and by determining the momentum flux. For the shallow marginal seas, such as the East China Sea, turbidity would be another important factor promoting diurnal warming. It suggests the need for the diurnal variation to be considered in SST measurement, air-sea flux estimation and multiple sensors SST blending.

Parameter selection and model research on remote sensing evaluation for nearshore water quality

Using remote sensing technology for water quality evaluation is an inevitable trend in marine environmental monitoring. However, fewer categories of water quality parameters can be monitored by remote sensing technology than the 35 specified in GB3097-1997 Marine Water Quality Standard. Therefore, we considered which parameters must be selected by remote sensing and how to model for water quality evaluation using the finite parameters. In this paper, focused on Leizhou Peninsula nearshore waters, we found N, P, COD, PH and DO to be the dominant parameters of water quality by analyzing measured data. Then, mathematical statistics was used to determine that the relationship among the five parameters was COD>DO>P>N>p H. Finally, five-parameter, fourparameter and three-parameter water quality evaluation models were established and compared. The results showed that COD, DO, P and N were the necessary parameters for remote sensing evaluation of the Leizhou Peninsula nearshore water quality, and the optimal comprehensive water quality evaluation model was the fourparameter model. This work may serve as a reference for monitoring the quality of other marine waters by remote sensing.

Factors affecting spring bloom in the South of Cheju Island in the East China Sea

A soil circulation occurs in the south of Cheju Island in the spring. Nutrients and its influence on chlorophyll a(Chl a) around the circulations were studied from April 9 to May 6, 2007. Spring bloom with elevated concentrations of Chl a was observed during the investigation. High concentrations of phosphate, nitrate and silicate at 0.6, 12, and 8 mmol/m3, respectively, were detected. A low water temperature prevented the growth of phytoplankton. Chl a concentrations in the study area might be strongly associated with the high silicate concentration.

Study on ecosytem service function change of island based on remote sensing

Based on the interpretation of the remote sensing data presented by the resource satellite, this paper states the fact that the land-use area in Donghai Island, which is located in the south of Zhanjiang, Guangdong Province,had expanded by 576.71 hm2 in the 25 years from 1986 to 2010 because of human activities such as land reclamation; in the meantime, great changes in types of land cover on the island have occurred. The definite change in land use leads to the remarkable transition in its ecosystem service value. Therefore, by applying the Costanza method in this paper to quantificationally analyze the changes in its ecosystem services on this island;the Costanza method is a calculation technique that shows the service value per unit area of island. It is found that from 1986 to 2010, especially in the recent years, due to the rapid development in the petrifaction, steel and port industries, the areas of cultivated land, woodland, grassland and desert have decreased in different degrees, while the lands for residence, industry and traffic construction and the areas of water and wetlands have increased.Consequently, compared with the number of RMB 547.57×106 yuan per year in 1986, the ecosystem service value of Donghai Island was greatly reduced to RMB 493.94×106 yuan per year in 2010. As for the spatial distribution, it presents a feature that it is higher in the west and low in the east. The results manifest that it is of great significance to analyze the changes in the ecosystem service function on the basis of the service value of the island presented by the remote sensing data in a quantificational way, which will contribute to the promotion of ecological compensation.