Summertime temperature variations in the middle and lower reaches of Yangtze River and their related circulation anomalies in the past five decades

Using the daily data of temperature from China Meteorological Administration and the NCEP/NCAR reanalysis from 1960 to 2005, we have analyzed the relationships between the summertime high/low temperature events in the middle and lower reaches of the Yangtze River （MLRYR） and the related circulation anomalies in the Eastern Hemisphere. Our results have demonstrated that a significantly increasing trend is observed in daily minimum temperature in the past 50 years. And in some regions in the Northern Hemisphere, the opposite scenarios are observed in circulation anomalies in lower and upper parts of the troposphere in the years when the temperatures are higher than normal, as compared to those in the years when the temperatures are lower than normal in the middle and lower reaches of the Yangtze River （MLRYR）. Additionally, the anomalous circulation structure in vertical direction in both the high and lower temperature years are barotropic. It is found that the emergence and maintenance of the aforementioned anomalous circulations are related to three kinds of wave train teleconnection patterns. Further more, influences of the long wave surface radiation on the air temperature are stronger in the nighttime than that in the daytime. While both the maximum and minimum temperatures have negative relationships with the sensible heat flux but positive relationships with the latent heat flux. To some extent, the anomalous dynamic heating （cooling） caused by the vertical thermal advection as well as the diabatic heating （cooling） caused by diabatic processes can explain the formation of the high （low） temperature events in the middle and lower reaches of the Yangtze River （MLRYR） in boreal summer.

Temperatures and Winds over Tropical Middle Atmosphere during Two Contrasting Summer Monsoons, 1975 and 1979

Using the monthly geopotential heights and winds for 700 and 200 hPa for India during July and August, and the weekly M-100 Soviet rocketsonde temperature and wind data for Thumba (8.5 ° N, 76.9 ° E) during the last week of June and the first week of September for the two contrasting summer monsoon years 1975 (a very strong monsoon year) and 1979 (a very weak monsoon year), a study has been made to examine the mean circulation features of the troposphere over India, and the structures of the temperatures and the winds of the middle atmosphere over Thumba. The study suggested that the axis of the monsoon trough (AMT) at 700 hPa shifted southward in 1975 and northward towards the foothills of the Himalayas in 1979, from its normal position. Superimposed on the low-pressure area (AMT) at 700 hPa, a well-defined divergence was noticed at 200 hPa over the northern India in 1975.The mean temperatures at 25,50 and 60 km (middle atmosphere) over Thumba were cooler in 1975 than in 1979. While a cooling trend in 1975 and warming trend in 1979 were observed at 25 and 50 km, a reversed picture was noticed at 60 km. There was a weak easterly / westerly (weak westerly phase) zonal wind in 1975 and a strong easterly zonal wind in 1979. A phase reversal of the zonal wind was observed at 50 km. A tentative physical mechanism was offered, in terms of upward propagation of the two equatorially trapped planetary waves i.e. the Kelvin and the mixed Rossby-gravity waves, to explain the occurrence of the two spells of strong warmings in the mesosphere in 1975.

High Temperature-preventing Cultivation Technology of Single-season Middle Rice for High Yield and High Quality in Jianghuai Area

In recent years,with the global climate change,the frequency and duration of high temperature in summer and autumn have increased,causing high temperature heat damage to summer crops such as rice and maize.From the end of July to early August is the main period of high temperature occurrence,during which the daily average temperature above 30℃is a high probability event,and even the highest temperature is above 38℃,while this period coincides with the booting-blooming-filling stage of the single-season middle rice in Jianghuai,especially the middle-season indica rice,so it often leads to the degradation of rice spikelets,pollen abortion,difficulty in pollen dispersion,and even difficulty in heading,resulting in a serious decline in the seed setting rate and poor filling of grains,which finally affect the yield and quality.Based on the goal of high-yielding high-quality rice cultivation,this paper proposed targeted technical measures for single-season middle rice from the aspects of planting time sequence optimization,selection of high-temperature-resistant varieties,population construction,fertilizer and water management technology,and how to compensate for the occurrence of unexpected disasters to promote plant growth.This study provides technical support for high-yielding high-quality stress-resistant and disaster-reducing rice cultivation technology.

Influence of ecological restoration on regional temperature-vegetation-precipitation dryness index in the middle Yellow River of China

Drought is an important disaster factor disturbing the stability of the ecosystem in the middle reaches of the Yellow River(YRM).In this study,the spatiotemporal distribution of drought in the YRM from 2000 to 2021 was quantitatively investigated by constructing the TVPDI(Temperature-VegetationPrecipitation Dryness Index),and its driving mechanism was explored.The results show that:(1)a significant decreasing trend was observed in the regional annual TVPDI of the YRM,while the autumn TVPDI index showed an increasing trend during 2000-2021.(2)Plants are more susceptible to drought during the growing season.(3)Drought in YRM showed significant spatial heterogeneity,and the high gully area in the Loess Plateau and the earth-rocky mountain areas were less affected by drought than other regions.(4)The Structural Equation Model(SEM)indicated that regional soil moisture and vegetation coverage have a direct influence on regional TVPDI variation.This study has explored the regional differences of drought in different seasons and landforms in the YRM,providing a basis for carrying out targeted seasonal ecological management and refining regional environmental governance,as well as a reference for formulating differentiated ecological restoration and water resource allocation strategies according to local conditions.

2022-2023年中昆仑山北坡不同海拔气象要素梯度对比分析

中昆仑山北坡既包含绿洲、荒漠及其过渡带等不同下垫面,又囊括沙漠和高原气候,由北向南生态环境差异大,气候变化多端,然而由于山地地区自然环境恶劣,气象台站较少且分布不均,给该地区气象要素的研究带来了一定挑战,致使对该区域气象要素的掌握尚不全面,因此开展关于中昆仑山北坡气象要素的研究十分有必要。本文利用中昆仑山北坡9个不同海拔气象台站连续一年(2022年8月至2023年7月)的气象要素数据,探究该山区1.5 m高度处近地面气象要素随海拔梯度的时空变化特征。结果表明:(1)不同海拔风向变化显著,风速随海拔升高而增大,海拔1738~3044 m的站点受山谷风影响,存在两个主导风向且风速日变化呈“双峰型”;(2)中昆仑山北坡的气温垂直递减率(Temperature lapse rate,以下简称TLR)均低于标准大气气温直减率,平均气温垂直递减率TLR_(mean)、最高气温垂直递减率TLR_(max)和最低气温垂直递减率TLRmin分别为-0.56℃·(100m)^(-1)、-0.60℃·(100m)^(-1)和-0.47℃·(100m)^(-1),季节性特征表现为夏季陡,冬季浅;(3)不同海拔存在多个逆温层和逆湿层,逆温和逆湿强度的季节差异较大,表现为夏季逆温强度最小,逆湿强度较大,冬季逆温强度最大,逆湿强度最小,最强逆温和逆湿均出现在海拔1256~1409 m;(4)夏季典型天气下晴天的逆温逆湿均大于阴雨天,晴天最大逆温强度是阴雨天的4.32倍,晴天比湿变化范围大于阴雨天,逆湿强度是阴雨天的1.11倍;(5)中昆仑山北坡4-9月占全年总降水的86%以上,随海拔升高降水梯度变化明显,表现为“增多-减少-增多”的趋势,在2800~3200 m存在一个明显降水带。

Spatiotemporal deformation analysis of glaciers and surrounding landscapes in the Shishapangma region using InSAR techniques

Glacier dynamics in the Himalayan midlatitudes,particularly in regions like the Shishapangma,are not yet fully understood,especially the localized topographic and climatic impacts on glacier deformation.This study analyzes the spatiotemporal characteristics of glacier surface deformation in the Shishapangma region using the Small Baseline Subset(SBAS)Interferometric Synthetic Aperture Radar(In SAR)technique.The analysis reveals an average deformation rate of-4.02±17.65 mm/yr across the entire study area,with glacier regions exhibiting significantly higher rates of uplift(16.87±13.20 mm/yr)and subsidence(20.11±14.55 mm/yr)compared to non-glacier areas.It identifies significant surface lowering on the mountain flanks and localized uplift in certain catchments,emphasizing the higher deformation rates in glacial areas compared to non-glacial ones.We found a strong positive correlation between temperature and cumulative deformation(correlation coefficient of 0.63),particularly in glacier areas(0.82).The research highlights the role of temperature as the primary driver of glacier wastage,particularly at lower elevations,with strong correlations found between temperature and cumulative deformation.It also indicates the complex interactions between topographic features,notably,slope gradient,which shows a positive correlation with subsidence rates,especially for slopes below 35°.South-,southwest-,and west-facing slopes exhibit significant uplift,while north-,northeast-,and east-facing slopes predominantly subside.Additionally,we identified transition zones between debris-covered glaciers and clean ice as areas of most intense deformation,with average rates exceeding 30 mm/yr,highlighting these as potential high-risk zones for geohazards.This study comprehensively analyzes the deformation characteristics in both glacier and non-glacier areas in the Shishapangma region,revealing the complex interplay of topographic,climatic,and hydrological factors influencing glacier dynamics.

Temperature variations recovered from tree-rings in the middle Qilian Mountain over the last millennium

Based on the cross-dated tree-ring samples collected from the middle Qilian Moun- tain, a standard ring-width chronology had been developed, which covered the period AD 1000 to 2000. The correlations between the chronology and climatic records from the nearby meteorological stations indicated that temperature was the dominant climatic factor for tree growth at upper timberline, and the most important climatic factor for the tree growth in the area was the mean temperature from previous December to current April. The temperature variations recovered from the ring-width data showed a cold period during the “Little Ice Age” and the con- tinuous warming during the twentieth century. Comparison between the ring-width chronology and δ18O records from the Dunde ice core in the Qilian Mountain indicated that there was a con- sistent trend in both time series. A significant correlation existed between our ring-width chro- nology and the Northern Hemispheric temperature, suggesting that the climate changes in the Qilian Mountain were not only driven by regional factors, but also responsive to the global cli- mate.

南水北调中线涿州站冬季异常低温事件频次分析

为有效揭示南水北调中线工程冬季异常低温事件的发生规律,选取中线总干渠明渠段最北端冬季气温相对最低、冰情严重的涿州气象站为例,基于该站1981~2021年冬季日平均气温数据,在采用标准差阈值法对冬季异常低温事件进行定义和等级划分的基础上,对中线工程近年来的冬季异常低温事件频次变化规律进行了统计分析。结果表明:(1)进入12月份,涿州站日平均气温基本接近0℃,之后逐步降低;在12月下旬至次年的1月中旬,日平均气温达到年度最低,多年平均值基本维持在-4℃上下;而后逐步上升,在2月中旬前后基本恢复至0℃以上。(2) 1981~2021年间,涿州站共发生冬季异常低温事件31次,累计天数251 d,其中1980年代发生次数最多,其次是2000和2010年代,而1990年代发生次数最少,事件发生频次总体呈现下降趋势。(3)在冬季3个月中,1月份发生次数最多,次均发生天数也最长,12月份次之,而2月份发生次数最少,次均发生天数也最短,冬季异常低温事件发生日主要集中在12月下旬至1月上旬及1月中下旬。(4) 1981~2021年,涿州站冬季分别发生一级、二级、三级异常低温事件11,5,15次,其中,一级、三级事件在1月发生次数最多,而二级事件在1月发生次数最少。正式通水至2021年,中线工程共发生冬季异常低温事件3次,且均为三级,对冰期输水影响相对有限。研究成果可为南水北调中线工程冰期输水调度和冰凌灾害防御提供参考。

Possible Combined Influences of Absorbing Aerosols and Anomalous Atmospheric Circulation on Summertime Diurnal Temperature Range Variation over the Middle and Lower Reaches of the Yangtze River

Based on the temperature data from the China Meteorological Administration, NCEP-NCAR reanalysis data, and the TOMS Aerosol Index （AI）, we analyze the variations in the summertime diurnal temperature range （DTR） and temperature maxima in the middle and lower reaches of the Yangtze River （MLRYR） in China. The possible relationships between the direct warming effect of the absorbing aerosol and temperature variations are further investigated, although with some uncertainties. It is found that the summertime DTR exhibits a decreasing trend over the most recent 50 years, along with a slight increasing tendency since the 1980s. The trend of the maximum temperature is in agreement with those of the DTR and the absorbing aerosols. To investigate the causes of the large anomalies in the temperature maxima, composite analyses of the circulation anomalies are performed. When anomalous AI and anomalous maximum temperature over the MLRYR have the same sign, an anomalous circulation with a quasi-barotropic structure occurs there. This anomalous circulation is modulated by the Rossby wave energy propagations from the regions northwest of the MLRYR and influences the northwestern Pacific subtropical high over the MLRYR. In combination with aerosols, the anomalous circulation may increase the maximum temperature in this region. Conversely, when the anomalous AI and anomalous maximum temperature in the MLRYR have opposite signs, the anomalous circulation is not equivalently barotropic, which possibly offsets the warming effect of aerosols on the maximum temperature changes in this region. These results are helpful for a better understanding of the DTR changes and the occurrences of temperature extremes in the MLRYR region during boreal summer.

Simulation of sea surface temperature changes in the Middle Pliocene warm period and comparison with reconstructions

The Middle Pliocene (ca 3.12–2.97 Ma) is a recent warm period in the Earth’s history. In many respects, the warmth of the Middle Pliocene is similar to the probable warm situation of the late 21st century predicted by climate models. Understanding the Middle Pliocene climate is important in predicting the future climate with global warming. Here, we used the latest reconstructions for the Middle Pliocene—Pliocene Research Interpretation and Synoptic Mapping (PRISM) version 3—to simulate the Middle Pliocene climate with a fully coupled model Fast Ocean Atmosphere Model. From comparison of the results of simulations with reconstructions, we considered two important scientific topics of Middle Pliocene climate modeling: extreme warming in the subpolar North Atlantic and a permanent El Ni?o in the tropical Pacific. Our simulations illustrate that the global annual mean sea surface temperature (SST) in the Middle Pliocene was about 2.3°C higher than that in the pre-industrial era. The warming was stronger at midand high latitudes than at low latitudes. The simulated SST changes agree with SST reconstructions in PRISM3 data, especially for the North Atlantic, North Pacific and west coast of South America. However, there were still discrepancies between the simulation of the SST and reconstructions for the subpolar North Atlantic and tropical Pacific. In the case of the Atlantic, the weakened meridional overturning circulation in the simulation did not support the reconstruction of the extremely warm condition in the subpolar North Atlantic. In the case of the tropical Pacific, the whole ocean warmed, especially the eastern tropical Pacific, which did not support the permanent El Ni?o suggested by the reconstruction. From evaluation of the modeling and reconstruction, we suggest that the above discrepancies were due to uncertainties in reconstructions, difficulties in paleoclimate modeling and deficiencies of climate models. The discrepancies should be reduced through consideration of both the modeling and data.

中低温煤焦油转化利用技术研究进展

随着煤焦油深加工技术的发展,中低温煤焦油的综合利用受到关注。介绍了国内外中低温煤焦油利用的研究现状,对中低温煤焦油的分离、加氢改质利用,制燃料油、特种油品和高值化学品,煤焦油掺混加氢以及煤沥青利用的研发进行了综述和分析。基于中低温煤焦油馏分的构成特性,提出了中低温煤焦油“分质分级转化利用”技术路线,充分利用其分子特征结构,研究高效催化剂使煤焦油定向转化为目标产品。这为煤焦油高效清洁利用提供了多元化、高值化和精细化的途径。

新疆中天山北坡断裂带不同海拔高度土壤温度分布特征

研究中天山断裂带从高山带到准噶尔盆地边缘整个过渡带的土壤温度分布特征有助于理解干旱区土壤环境特征,从而为土地利用、农业生产提供依据。本文选取新疆中天山断裂带海拔高度呈梯度分布的6个气象站2005年至2020年各层土壤温度的日观测数据,利用统计方法分析了不同地形、不同深度土壤温度随海拔高度的变化特征以及不同海拔高度土壤温度随深度的变化特征。分析表明:中天山北坡土壤温度变幅随海拔高度的降低而升高。不同地形的土壤最高温和最低温的年温差浅层大于深层,由浅至深年最高温度和年最低温度出现的时间逐渐推迟;年内中天山北坡不同海拔高度0~20 cm的土壤日平均温度曲线大致呈余弦函数曲线,320 cm深度的土壤温度基本呈正弦函数分布,较0~20 cm地温的最高和最低晚3个月左右。研究区土壤温度随海拔高度降低呈现先升高后降低的趋势。在海拔为3539~600 m高度范围,土壤温度随着海拔的升高而降低。在600~441 m高度范围,土壤温度随着海拔的下降而下降;0~20 cm为土壤温度变化的活跃层,40 cm深度的土壤温度可称之为过渡层,320 cm深度称为土壤温度的稳定层,80~160 cm称为土壤温度的次稳定层。

近136年(1885~2020年)长江中下游伏旱期划分及其演变分析

少雨高温的伏旱期对长江中下游地区农业、水利和人体健康等具有重要影响,但目前缺乏对该地区伏旱期的历史划分,对其长期变化规律也缺乏充分认识。本文利用1885年以来已划定的长江中下游沿江五站(上海、南京、芜湖、九江和汉口)梅雨期和夏季日气温、降水资料,对出梅后的少雨高温时段分别确定了少雨和高温的定量标准,划定出1885~2020年长江中下游伏旱期,并用统一气温标准结合伏旱期长度,综合确定了近136 a(1885~2020年)伏旱期强度指数。这136 a(包含有16个无伏旱年及10个入秋伏旱年)里伏旱期的年平均长度为21.6 d,呈现出3~6 a、36 a和84 a周期。1951年以来,1959~1978年是伏旱期长度的主要峰期,1980~1987年是伏旱期长度的下降谷期,之后缓慢增加;1980年代之后虽然大于30 d的长伏旱期有减少趋势,但是15~30 d且高强度的伏旱期频现;1995年之后秋伏旱明显增多,夏季延迟。136 a里最长且强的伏旱期依次出现于1934、1967、1978和2013年;最早的伏旱期出现在6月中旬,最晚在9月中下旬。近40 a来,伏旱期高温(≥35.0°C)日数大幅提高,伏旱期高温发生率从1980年代的30%左右上升到近年的50%以上,对人体健康构成威胁。长(强)伏旱期的副热带环流特征为西太平洋副热带高压稳定控制长江中下游区,而短(弱)伏旱期西太平洋副热带高压多偏东或偏南,入秋伏旱与副热带高压稳定西伸有关。伏旱期内高温日数的演变受到双重人类活动的制约,它不仅与人类活动导致的全球海陆升温有关,并且因地而异,即受到局地生态环境演变和城市热岛效应增减的人为作用影响。印度—太平洋季风区陆海温差对长江中下游伏旱期长度年代际变化有重要调制作用。

Ag掺杂Mo-12Si-8.5B合金在25~600℃的摩擦学行为

本文中采用放电等离子烧结法制备了Mo-12Si-8.5B和Mo-12Si-8.5B-10%Ag这2种合金,通过高温真空摩擦磨损试验仪测试了2种合金与Al_(2)O_(3)摩擦副在25~600℃间的干摩擦学性能.结果表明:与Mo-12Si-8.5B合金相比,在25~600℃区间Mo-12Si-8.5B-10%Ag合金表现出更低的摩擦系数和磨损率.在600℃时,Mo-12Si-8.5B-10%Ag合金的摩擦系数和磨损率均可达到最小值,其值分别为0.41和1.14×10^(-5)mm^(3)/(N·m),此时Mo-12Si-8.5B-10%Ag合金的干摩擦性能表现最佳,这与Mo-12Si-8.5B-10%Ag合金磨损表面的MoO_(3)、SiO_(2)和Ag_(2)MoO_(4)等润滑相的存在及Ag在25~600℃范围内起到的润滑效果有关.此外,在25~200℃区间,Mo-12Si-8.5B-10%Ag合金的磨损机制主要为黏着磨损和剥层磨损,在400~600℃范围内,则以黏着磨损和氧化磨损为主.

两种添加剂对石蜡-硬脂酸蜡料性能的影响

为探究改性松香和聚乙烯对中温模料组织性能的影响,本研究以石蜡-硬脂酸二元系模料为基体,在此基础上逐步添加改性松香和聚乙烯,探究二元基体配比、改性松香及聚乙烯含量对模料熔点、抗弯强度、针入度和融合均匀性等物理特性的影响,在此基础上研制出一种针入度达1.06 mm、强度达6.02 MPa、熔点在58℃附近的综合性能良好的中温模料,为中温模料改良优化提供理论支持。

2022年夏季热带印度洋-太平洋海温异常对长江中下游高温异常的影响

利用NCEP/NCAR再分析资料、ERSST v5海表温度资料和大气环流模式,分析了2022年夏季热带印度洋-太平洋海温异常对长江中下游地区高温事件的影响机理及相对贡献。研究表明,此次高温异常事件受La Ni a事件和负位相IOD事件的共同影响,长江中下游地区的温度异常为1.52℃、为近40年来最高,温度正异常的极大值位于河南和湖北两省交界处的西侧。热带印度洋和太平洋海温异常引起了长江中下游约0.39℃的增温,对长江中下游地区此次高温异常的贡献为25.66%。La Ni a事件和负位相IOD事件可通过增强西太平洋副热带高压,进而有利于维持长江中下游地区的异常下沉运动,为高温事件的发生提供了有利条件。

局部降温对输水渠道水华抑制的影响分析

南水北调中线工程自通水以来,发挥着巨大的社会和经济效益,已成为京津地区的主力水源。中线工程输水的水质理化指标相对稳定,但局部渠段存在藻类异常增殖现象,有水华爆发的风险。针对出现的藻类异常增殖问题,在通冷风这一改变局部气象条件的工程措施基础上,建立了澎河—沙河渡槽段平面二维水动力和水质模型,研究了通风位置、通风温度和通风时长等因素对输水渠道水温和藻类的影响。研究表明:水温和叶绿素a浓度均与通风位置、通风温度和通风时长有关,通风温度越低、通风时长越长,平均水温和叶绿素a浓度下降幅度越大,平均水温最高可下降约2℃,叶绿素a浓度最大可降低约54.5%,且仅上游和全渠段通风均可有效降低水温和抑制藻类生长,仅下游通风对水温和藻类的影响较小。因此,采取局部降温的方式可以起到一定的降低叶绿素a浓度的作用,综合考虑藻类抑制效果和工程成本,在水华易爆发渠段的上游通冷风是行之有效的工程措施。

稻茬烤烟中部烟叶对热泵密集烤房稳温降湿烘烤工艺的响应

为探寻稻茬烤烟中部烟叶的热泵密集烤房稳温降湿烘烤工艺,采用云烟87中部烟叶作为烘烤试验材料,研究了稳温降湿烘烤工艺与四步式烘烤工艺的效果。结果表明:与四步式烘烤工艺相比,稳温降湿烘烤工艺可以增强烟叶的色度,增加烟叶单叶质量、糖含量和绿原酸含量,正组烟叶比例提高3.61%,杂色烟叶比例降低1.38%,微带青烟叶比例降低3.04%,上等烟比例提高6.50%,外观质量指数和评吸质量总分为8.02%、2.24%,能耗总成本降低8.49%。因此,稻茬烤烟中部烟叶采用热泵密集烤房稳温降湿烘烤工艺,可以提高烤后烟叶品质,降低烘烤成本,提高烘烤经济效果。

基于标准化温度指数的南水北调中线工程沿线地区冷暖冬评估

选择南水北调中线工程沿线邯郸、正定、涿州为代表地区,利用1979-2021年冬季逐日气温数据,分析各代表区气温序列统计频率分布与理论概率分布的拟合情况,提出标准化温度指数(standardized temperature index,STI),并据此建立新的冬季冷暖量化评估模型。结果表明:STI方法与国标法的冬季冷暖评估结果基本一致,但在各代表区强冷冬和强暖冬划定上,STI评估得出的年份数量均少于国标法;各代表区以1月份气温计算得出的冷暖等级阈值对应的气温值均明显低于按整个冬季3个月计算结果。工程所在纬度越高,冬季冷暖等级阈值对应的气温值越低;根据STI评估结果,邯郸、正定、涿州发生强冷冬概率分别为7.14%、9.52%和4.76%,发生弱冷冬及以上的概率分别为38.09%、40.48%和38.09%,发生平冬的概率分别为21.43%、28.57%和21.43%,发生弱暖冬及以上的概率分别为40.48%、30.95%和40.48%,发生强暖冬的概率分别为4.76%、7.14%和2.38%。研究成果与基于正态分布的国标法相比,考虑了气温序列的偏态性概率分布特征,对相对冷暖的判别更科学,有推广应用价值。

湖北省39个中稻品种2022年度耐热性鉴定与利用评价

为鉴定评价2022年度湖北省已进入第二年区试的39个中稻品种的耐热性,利用江汉平原抽穗开花至灌浆结实期自然高温的气候特点,通过分期播种,采用田间自然鉴定与玻璃温室鉴定相结合的方法开展研究。结果表明,本年度高温时段很好地覆盖了供试材料田间第1播期的开花期,以及第2、3播期的孕穗期和开花期,完全达到了鉴定条件要求;玻璃温室的温度也完全达到了鉴定条件要求,鉴定结果有效。39份供试材料耐热性总体表现优良。佳稻2806、贡两优17和荃优803等3个耐热性强的品种可优先审定后在热害常发稻区进行推广应用,其中佳稻2806还可作为耐热性种质资源进行育种利用。29个耐热性较强的品种可根据其他性状综合表现进行审定,并在热害常发稻区推广应用,其中扬辐糯4号、襄中稻2号、金籼占925、华珍166、襄中稻3号、楚晶丝苗、福香288和黄华占等8个耐热性较强的常规品种(系),在耐热性育种种质资源较少的情况下具有一定的利用价值。7个品种耐热性表现一般至较弱,其中源两优888、CD3A/宜恢80和19香等3个耐热性较弱的品种应优先淘汰。华两优2134、华两优8620、沪研优1017和南红3号等4个耐热性表现一般的品种,在推广应用中也要特别谨慎。