期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
The Performance of Downward Shortwave Radiation Products from Satellite and Reanalysis over the Transect of Zhongshan Station to Dome A, East Antarctica
1
作者 Jiajia JIA zhaoliang zeng +3 位作者 Wenqian ZHANG Xiangdong ZHENG Yaqiang WANG Minghu DING 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2024年第8期1574-1588,1671-1675,共20页
The downward shortwave radiation(DSR) is an important part of the Earth's energy balance, driving Earth's system's energy, water, and carbon cycles. Due to the harsh Antarctic environment, the accuracy of ... The downward shortwave radiation(DSR) is an important part of the Earth's energy balance, driving Earth's system's energy, water, and carbon cycles. Due to the harsh Antarctic environment, the accuracy of DSR derived from satellite and reanalysis has not been systematically evaluated over the transect of Zhongshan station to Dome A, East Antarctica.Therefore, this study aims to evaluate DSR reanalysis products(ERA5-Land, ERA5, MERRA-2) and satellite products(CERES and ICDR) in this area. The results indicate that DSR exhibits obvious monthly and seasonal variations, with higher values in summer than in winter. The ERA5-Land(ICDR) DSR product demonstrated the highest(lowest) accuracy,as evidenced by a correlation coefficient of 0.988(0.918), a root-mean-square error of 23.919(69.383) W m^(–2), a mean bias of –1.667(–28.223) W m^(–2) and a mean absolute error of 13.37(58.99) W m^(–2). The RMSE values for the ERA5-Land reanalysis product at seven stations, namely Zhongshan, Panda 100, Panda 300, Panda 400, Taishan, Panda 1100, and Kunlun, were 30.938, 29.447, 34.507, 29.110, 20.339, 17.267, and 14.700 W m^(-2), respectively;with corresponding bias values of 9.887, –12.159, –19.181, –15.519, –8.118, 6.297, and 3.482 W m^(–2). Regarding seasonality, ERA5-Land, ERA5,and MERRA-2 reanalysis products demonstrate higher accuracies during spring and summer, while ICDR products are least accurate in autumn. Cloud cover, water vapor, total ozone, and severe weather are the main factors affecting DSR. The error of DSR products is greatest in coastal areas(particularly at the Zhongshan station) and decreases towards the inland areas of Antarctica. 展开更多
关键词 downward shortwave radiation East Antarctic reanalysis product satellite product validation
下载PDF
Estimation and Long-term Trend Analysis of Surface Solar Radiation in Antarctica: A Case Study of Zhongshan Station
2
作者 zhaoliang zeng Zemin WANG +8 位作者 Minghu DING Xiangdong ZHENG Xiaoyu SUN Wei ZHU Kongju ZHU Jiachun AN Lin ZANG Jianping GUO Baojun ZHANG 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2021年第9期1497-1509,共13页
Long-term,ground-based daily global solar radiation (DGSR) at Zhongshan Station in Antarctica can quantitatively reveal the basic characteristics of Earth’s surface radiation balance and validate satellite data for t... Long-term,ground-based daily global solar radiation (DGSR) at Zhongshan Station in Antarctica can quantitatively reveal the basic characteristics of Earth’s surface radiation balance and validate satellite data for the Antarctic region.The fixed station was established in 1989,and conventional radiation observations started much later in 2008.In this study,a random forest (RF) model for estimating DGSR is developed using ground meteorological observation data,and a highprecision,long-term DGSR dataset is constructed.Then,the trend of DGSR from 1990 to 2019 at Zhongshan Station,Antarctica is analyzed.The RF model,which performs better than other models,shows a desirable performance of DGSR hindcast estimation with an R^2 of 0.984,root-mean-square error of 1.377 MJ m^(-2),and mean absolute error of 0.828 MJ m^(-2).The trend of DGSR annual anomalies increases during 1990–2004 and then begins to decrease after 2004.Note that the maximum value of annual anomalies occurs during approximately 2004/05 and is mainly related to the days with precipitation (especially those related to good weather during the polar day period) at this station.In addition to clouds and water vapor,bad weather conditions (such as snowfall,which can result in low visibility and then decreased sunshine duration and solar radiation) are the other major factors affecting solar radiation at this station.The high-precision,longterm estimated DGSR dataset enables further study and understanding of the role of Antarctica in global climate change and the interactions between snow,ice,and atmosphere. 展开更多
关键词 meteorological variables RF model estimated historical DGSR long-term trend analysis
下载PDF
Columnar optical,microphysical and radiative properties of the 2022 Hunga Tonga volcanic ash plumes
3
作者 Ke Gui Huizheng Che +11 位作者 Lin Tian Yaqiang Wang Chong Shi Wenrui Yao Yuanxin Liang Lei Li Yu Zheng Lei Zhang zhaoliang zeng Junting Zhong Zhili Wang Xiaoye Zhang 《Science Bulletin》 SCIE EI CAS CSCD 2022年第19期2013-2021,共9页
The Hunga Tonga-Hunga Ha’apai eruption on January 15,2022 was one of the most explosive volcanic eruptions of the 21st century and has attracted global attention.Here we show that large numbers of the volcanic aeroso... The Hunga Tonga-Hunga Ha’apai eruption on January 15,2022 was one of the most explosive volcanic eruptions of the 21st century and has attracted global attention.Here we show that large numbers of the volcanic aerosols from the eruption broke through the tropopause into the lower stratosphere,forming an ash plume with an overshooting top at 25-30 km altitude.In the four days following the eruption,the ash plume moved rapidly westward for nearly 10,000 km under stable stratospheric conditions characterized by strong tropical easterlies,weak meridional winds and weak vertical motion.The intrusion of the ash plume into the stratosphere resulted in a marked increase in atmospheric aerosol loading across northern Australia,with the aerosol optical depth(AOD)observed by satellites and sun-photometers peaking at 1.5 off the coast of northeastern Australia;these effects lasted for nearly three days.The ash plume was characterized by fine-mode particles clustered at a radius of about 0.26μm,with an observed peak volume of 0.25μm^(3)μm^(-2).The impact of the ash plume associated with the Hunga Tonga eruption on the stratospheric AOD and radiative balance in the tropical southern hemisphere is remarkable,with an observed volcanic-induced perturbation of the regional stratospheric AOD of up to 0.6.This perturbation largely explains an instantaneous bottom(top)of the atmosphere radiative forcing of-105.0(-65.0)W m^(-2)on a regional scale. 展开更多
关键词 Hunga Tonga-Hunga Ha’apai eruption Volcanic aerosols Multi-satellite and ground-based observations Aerosol optical–microphysical properties Radiative forcing
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部