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1.
通过对依安县气象站1961-2010年气温资料进行统计分析,得出依安县的年平均气温呈上升趋势﹙0.45℃/10 a﹚,四季气温也呈上升趋势,尤其是冬季变暖最明显﹙0.58℃/10 a﹚;年平均最低气温的上升趋势﹙0.73℃/10 a﹚远大于年平均最高气温的上升趋势﹙0.22℃/10 a﹚。以20世纪80年代末为界分为冷暖两个阶段,前为冷期,后为暖期。 相似文献
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采用宜君气象站1968—2017年地面观测资料,分析宜君县近50 a年平均气温、季平均气温、月平均气温及年极端最高气温、极端最低气温的气候变化特征。结果表明:宜君县近50 a年平均气温总体呈上升趋势,其线性变化趋势率为0.362℃/10 a,20世纪90年代末(1997年)之前为偏冷期,之后为偏暖期;冬季和春季气温变化显著,夏、秋季变化不明显;年平均最高气温和平均最低气温变化趋势与年平均气温变化趋势一致。 相似文献
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利用1951～2000年营口气温资料，进行平均最高气温、平均最低气温和平均气温的年、季、月值的演变分析，得出近50a营口年、春季、冬季都有明显的气候变暖趋势。线性增长率均大于等于0．2℃／10a，特别是2，3，4月气温偏高较为突出的结论。 相似文献
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根据海南岛西部1951～2000年气温及降水资料，运用一元线性回归、相关分析等数理统计学方法，对海南岛西部近50年来气候变化做了分析。分析表明：近50年来海南岛西部年均气温呈上升趋势，增温率为0．24℃／10a，90年代增温尤其明显。不同季节气温的变化趋势不同，冬季变暖趋势最明显。根据近50年冷暖波动情况，可将海南岛西部气候划分成两个冷期和两个暖期。近50年历年降水量则呈下降趋势，变幅为一23．93mm／10a，其中80年代降水最少。各季节中，春、秋、冬季降水呈上升趋势。近50年海南岛西部降水变化可分为三个多雨期和三个少雨期。 相似文献
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塔里木灌区近40年来气候变化特征 总被引：6，自引：1，他引：6
根据塔里木灌区阿拉尔气象站1961年1月－1999年12月的气温及降水资料，分析了塔里木灌区近40年的气候变化，得出近40年来塔里木灌区降水量呈上升趋势（4．60mm/10年），秋季降水量却呈下降趋势（－3．45mm／10年）；年平均气温呈上升趋势（0．065℃／10年），冬季变暖的趋势（0．849℃／10年）；年平均气温呈上升趋势（－0．171℃／10年）；年极端低温的上升趋势（0．569℃／10年）大于年极端高温的下降趋势（－0．095℃／10年）。可以70年代末为界将近40年塔里木塔区气候分为冷、暖两个阶段，前为冷期，后为暖期。 相似文献
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利用华山1953-2008年逐日平均气温、最高气温和最低气温资料,运用M-K突变检验、Morlet小波分析等方法对华山气温变化特征进行了分析,结果表明:年平均气温、年平均最高气温和年平均最低气温均具有明显的冷期和暖期交替的特点,持续时间冷期比暖期长;四季气温均呈上升趋势,但增幅不同,冬季最大,夏季最小;年极端最低气温呈强烈的上升趋势;年平均气温、年平均最高气温和年平均最低气温突变分别出现在1995年、1997年和1993年,并且均存在准4 a、9 a的小尺度周期振荡和30 a左右大尺度周期振荡. 相似文献
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西双版纳地区近45年来气候变化特征 总被引：7，自引：3，他引：4
根据云南省西双版纳州景洪市气象站1961年1月至2005年1月的气温及降水资料,分析了西双版纳近45年来的气候变化特征,得出近45年来两双版纳年降水量呈下降趋势(-20.72 mm/10a),夏季降水量减少较明显(-24.28 mm/lOa),春季降水量却呈上升趋势(11.18mm/10a);年平均气温呈上升趋势(0.262℃/10a),四季气温也呈上升趋势,尤其是冬季变暖最明显(0.483℃/10a);年极端低温的上升趋势(0.545℃/10a)远远大于年极端高温的下降趋势(-0.088℃/10a).以20世纪70年代末为界将近45年西双版纳气候分为冷、暖两个阶段,前为冷期,后为暖期. 相似文献
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水城近50a气温变化特征分析 总被引：1，自引：0，他引：1
利用水城站1957-2006年的逐月平均气温、平均最高气温及平均最低气温资料,采用线性倾向估计对水城近50a季平均气温及年平均最高、最低气温的年际、年代际变化进行了统计分析。结果表明：近50a来水城年平均气温呈上升趋势,其线性倾向率为0．134℃／10a,春季气温距平近50a来却呈下降趋势,夏、秋、冬季气温呈上升趋势,上升趋势不一致,从各季节平均气温变化幅度来看,秋季最大,夏、冬次之,春季最小。50a来年平均最高气温、年平均最低气温均呈上升趋势。 相似文献
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The spatial and temporal variations of daily maximum temperature(Tmax), daily minimum temperature(Tmin), daily maximum precipitation(Pmax) and daily maximum wind speed(WSmax) were examined in China using Mann-Kendall test and linear regression method. The results indicated that for China as a whole, Tmax, Tmin and Pmax had significant increasing trends at rates of 0.15℃ per decade, 0.45℃ per decade and 0.58 mm per decade,respectively, while WSmax had decreased significantly at 1.18 m·s~(-1) per decade during 1959—2014. In all regions of China, Tmin increased and WSmax decreased significantly. Spatially, Tmax increased significantly at most of the stations in South China(SC), northwestern North China(NC), northeastern Northeast China(NEC), eastern Northwest China(NWC) and eastern Southwest China(SWC), and the increasing trends were significant in NC, SC, NWC and SWC on the regional average. Tmin increased significantly at most of the stations in China, with notable increase in NEC, northern and southeastern NC and northwestern and eastern NWC. Pmax showed no significant trend at most of the stations in China, and on the regional average it decreased significantly in NC but increased in SC, NWC and the mid-lower Yangtze River valley(YR). WSmax decreased significantly at the vast majority of stations in China, with remarkable decrease in northern NC, northern and central YR, central and southern SC and in parts of central NEC and western NWC. With global climate change and rapidly economic development, China has become more vulnerable to climatic extremes and meteorological disasters, so more strategies of mitigation and/or adaptation of climatic extremes,such as environmentally-friendly and low-cost energy production systems and the enhancement of engineering defense measures are necessary for government and social publics. 相似文献
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Yuepeng PAN Mengna GU Yuexin HE Dianming WU Chunyan LIU Linlin SONG Shili TIAN Xuemei Lü Yang SUN Tao SONG Wendell W. WALTERS Xuejun LIU Nicholas A. MARTIN Qianqian ZHANG Yunting FANG Valerio FERRACCI Yuesi WANG 《大气科学进展》2020,37(9):933-938
正While China’s Air Pollution Prevention and Control Action Plan on particulate matter since 2013 has reduced sulfate significantly, aerosol ammonium nitrate remains high in East China. As the high nitrate abundances are strongly linked with ammonia, reducing ammonia emissions is becoming increasingly important to improve the air quality of China. Although satellite data provide evidence of substantial increases in atmospheric ammonia concentrations over major agricultural regions, long-term surface observation of ammonia concentrations are sparse. In addition, there is still no consensus on 相似文献
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Observed daily precipitation data from the National Meteorological Observatory in Hainan province and daily data from the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis-2 dataset from 1981 to 2014 are used to analyze the relationship between Hainan extreme heavy rainfall processes in autumn (referred to as EHRPs) and 10–30 d low-frequency circulation. Based on the key low-frequency signals and the NCEP Climate Forecast System Version 2 (CFSv2) model forecasting products, a dynamical-statistical method is established for the extended-range forecast of EHRPs. The results suggest that EHRPs have a close relationship with the 10–30 d low-frequency oscillation of 850 hPa zonal wind over Hainan Island and to its north, and that they basically occur during the trough phase of the low-frequency oscillation of zonal wind. The latitudinal propagation of the low-frequency wave train in the middle-high latitudes and the meridional propagation of the low-frequency wave train along the coast of East Asia contribute to the ‘north high (cold), south low (warm)’ pattern near Hainan Island, which results in the zonal wind over Hainan Island and to its north reaching its trough, consequently leading to EHRPs. Considering the link between low-frequency circulation and EHRPs, a low-frequency wave train index (LWTI) is defined and adopted to forecast EHRPs by using NCEP CFSv2 forecasting products. EHRPs are predicted to occur during peak phases of LWTI with value larger than 1 for three or more consecutive forecast days. Hindcast experiments for EHRPs in 2015–2016 indicate that EHRPs can be predicted 8–24 d in advance, with an average period of validity of 16.7 d. 相似文献
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Based on the measurements obtained at 64 national meteorological stations in the Beijing–Tianjin–Hebei (BTH) region between 1970 and 2013, the potential evapotranspiration (ET0) in this region was estimated using the Penman–Monteith equation and its sensitivity to maximum temperature (Tmax), minimum temperature (Tmin), wind speed (Vw), net radiation (Rn) and water vapor pressure (Pwv) was analyzed, respectively. The results are shown as follows. (1) The climatic elements in the BTH region underwent significant changes in the study period. Vw and Rn decreased significantly, whereas Tmin, Tmax and Pwv increased considerably. (2) In the BTH region, ET0 also exhibited a significant decreasing trend, and the sensitivity of ET0 to the climatic elements exhibited seasonal characteristics. Of all the climatic elements, ET0 was most sensitive to Pwv in the fall and winter and Rn in the spring and summer. On the annual scale, ET0 was most sensitive to Pwv, followed by Rn, Vw, Tmax and Tmin. In addition, the sensitivity coefficient of ET0 with respect to Pwv had a negative value for all the areas, indicating that increases in Pwv can prevent ET0 from increasing. (3) The sensitivity of ET0 to Tmin and Tmax was significantly lower than its sensitivity to other climatic elements. However, increases in temperature can lead to changes in Pwv and Rn. The temperature should be considered the key intrinsic climatic element that has caused the "evaporation paradox" phenomenon in the BTH region. 相似文献
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Storms that occur at the Bay of Bengal (BoB) are of a bimodal pattern, which is different from that of the other sea areas. By using the NCEP, SST and JTWC data, the causes of the bimodal pattern storm activity of the BoB are diagnosed and analyzed in this paper. The result shows that the seasonal variation of general atmosphere circulation in East Asia has a regulating and controlling impact on the BoB storm activity, and the “bimodal period” of the storm activity corresponds exactly to the seasonal conversion period of atmospheric circulation. The minor wind speed of shear spring and autumn contributed to the storm, which was a crucial factor for the generation and occurrence of the “bimodal pattern” storm activity in the BoB. The analysis on sea surface temperature (SST) shows that the SSTs of all the year around in the BoB area meet the conditions required for the generation of tropical cyclones (TCs). However, the SSTs in the central area of the bay are higher than that of the surrounding areas in spring and autumn, which facilitates the occurrence of a “two-peak” storm activity pattern. The genesis potential index (GPI) quantifies and reflects the environmental conditions for the generation of the BoB storms. For GPI, the intense low-level vortex disturbance in the troposphere and high-humidity atmosphere are the sufficient conditions for storms, while large maximum wind velocity of the ground vortex radius and small vertical wind shear are the necessary conditions of storms. 相似文献
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《大气和海洋科学快报》2013,(4):227
正AIMS AND SCOPE Atmospheric and Oceanic Science Letters (AOSL) publishes short research letters on all disciplines of the atmosphere sciences and physical oceanography. 相似文献
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《大气和海洋科学快报》2014,7(6):F0003-F0003
AIMS AND SCOPE
Atmospheric and Oceanic Science Letters （AOSL） publishes short research letters on all disciplines of the atmosphere sciences and physical oceanography. Contributions from all over the world are welcome. 相似文献
Atmospheric and Oceanic Science Letters （AOSL） publishes short research letters on all disciplines of the atmosphere sciences and physical oceanography. Contributions from all over the world are welcome. 相似文献
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《大气和海洋科学快报》2014,(5):F0003-F0003
AIMS AND SCOPE Atmospheric and Oceanic Science Letters （AOSL） pub- lishes short research letters on all disciplines of the atmos- phere sciences and physical oceanography. Contributions from all over the world are welcome. 相似文献
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《大气科学进展》2014,(6)
正Aims Scope Advances in Atmospheric Sciences(AAS)is an international journal on the dynamics,physics,and chemistry of the atmosphere and ocean with papers across the full range of the atmospheric sciences,co-published bimonthly by Science Press and Springer.The journal includes Articles,Note and Correspondence,and Letters.Contributions from all over the world are welcome. 相似文献