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1.
乌鲁木齐南山中山带气候特征分析   总被引:3,自引:0,他引:3  
对乌鲁木齐南山中山带的气候资料进行了分析,总结出主要气候特征。  相似文献   

2.
本文利用某气象台14年的气候资料,对乌鲁木齐南山地区的雷暴天气作一较详细地描述,总结了雷暴天气活动的一般规律,初步划分了雷暴强度,归纳了4种有利于雷暴产生的大尺度背景场,对雷暴产生的原因及所需的基本物理条件做了初步分析,从而对本地强对流天气的短期、短时预报提供了一些有价值的线索。  相似文献   

3.
根据新疆乌鲁木齐地区9个气象台站1961—2009年的气候资料,采用线性回归分析和基于GIS的混合插值法,对近49 a该地区农业气候热量条件的时空变化规律进行了分析,结果表明:(1)乌鲁木齐地区热量资源具有显著的区域性差异,年平均气温、无霜冻期、≥0℃、≥10℃持续日数和活动积温在空间分布上均表现为"平原高于山区、北部...  相似文献   

4.
为了充分发挥新一代天气雷达在乌鲁木齐南山山区的探测作用,利用2003—2005年6—9月101次出现降水的雷达回波资料以及对应天气形势和地面实况,分析得出乌鲁木齐南山中山带对流云的回波顶高、强度、出现的时段、性质等参数特征和演变规律,从宏观上为该地区对流云人工增雨作业及短时预报提供科学依据。  相似文献   

5.
根据2002年夏季6~7月在乌鲁木齐南山山区的雷达观测资料,对回波的特征值以及回波的形态和演变特点进行了分析。  相似文献   

6.
利用1971-2011年乌鲁木齐小渠子气象站资料,对南山中山带40 a来的积雪特征及变化特点进行了分析.结果表明:乌鲁木齐南山中山带平均稳定积雪期为144 d;近40 a来出现的最大积雪深度为57 cm,年最大积雪深度出现在3月下旬的频率最大,平均积雪深度以2月最厚.自20世纪80年代以来出现稳定积雪初日推迟、终日提前、稳定积雪期缩短的趋势.近40 a来最大积雪深度递增趋势主要是由于冬季降水量增加和降雪强度增强所造成;而随着气温的逐渐变暖则造成稳定积雪初日的推迟和终日提前.  相似文献   

7.
应用EOS/MODIS—Terra卫星数据,按照NDVI(归一化植被指数)最大值合成法计算了乌鲁木齐地区2007、2010年生长季逐旬植被NDVI序列,得到植被长势演变图和植被指数分布基础数据,结合气象资料和南山中山带牧草监测站实测数据,分析了NDVI在乌鲁木齐地区的变化特点及其与气候因子的关系。结果表明:气温、降水是NDVI变化的主要驱动因子,但植被对于气候因子的响应普遍存在滞后性。乌鲁木齐地区NDVI旬最大值总体变化在0.46~0.83范围内。与近10 a中植被长势最好的2007年同期数据比较,2010年春季植被指数比2007年推迟4旬达到0.7以上,表明植被发育期比2007年推迟10~15 d;秋季植被指数7月中旬就出现下降拐点,表明植被发育期比2007年提前4旬进入种子成熟、黄枯期或停止生长。以上结论与南山中山带牧草监测站实测结果相符。  相似文献   

8.
杏树是雁北高寒区主栽果树品种之一,也是当地农民脱贫致富的重要收入来源。异常气候是影响当地杏树栽培优质丰产的主要障碍因素。通过近年来山西省阳高县异常天气对杏树生产的影响的分析调查,提出了相应的生产管理措施,对高寒区杏树优质丰产具有一定的指导意义。  相似文献   

9.
本文针对盆地区代表点的小麦条锈病冬繁与气候条件的关系进行相关性分析,由此确定四川小麦条锈病冬繁的适宜、次适宜、不适宜气候条件指标。从风险基本理论出发,建立了包括气候条件出现频率和寄主存在数量两个环境因子的四川省小麦条锈病冬繁农业气候风险模型,并划分了高、中、低风险等级。基于GIS技术,对四川省小麦条锈病冬繁农业气候风险进行了区划。区划结果表明,四川省的川西高原地区和川西南山地是小麦条锈病冬繁阶段低风险或无风险区,而盆地区是中、高风险的集中区。其中,盆地中部地区是主要高风险区。   相似文献   

10.
基于5种气候生产力模型的乌鲁木齐地区NPP计算分析   总被引:6,自引:0,他引:6  
根据大西沟、小渠子、乌鲁木齐和达坂城等4个台站1961-2007年的气候资料,分别采用Miami模型、Thornthwaite Memorial模型、Chikugo模型、朱志辉模型和周广胜模型对乌鲁木齐地区各类草场自然植被净第一性生产力进行了计算,并以周广胜模型计算结果为标准,分析了其它模型估算不同类型天然草场NPP的误差。  相似文献   

11.
正The Taal Volcano in Luzon is one of the most active and dangerous volcanoes of the Philippines. A recent eruption occurred on 12 January 2020(Fig. 1a), and this volcano is still active with the occurrence of volcanic earthquakes. The eruption has become a deep concern worldwide, not only for its damage on local society, but also for potential hazardous consequences on the Earth's climate and environment.  相似文献   

12.
正ERRATUM to: Atmospheric and Oceanic Science Letters, 4(2011), 124-130 On page 126 of the printed edition (Issue 2, Volume 4), Fig. 2 was a wrong figure because the contact author made mistake giving the wrong one. The corrected edition has been updated on our website. The editorial office is sincerely sorry for any  相似文献   

13.
14.
Index to Vol.31     
正AN Junling;see LI Ying et al.;(5),1221—1232AN Junling;see QU Yu et al.;(4),787-800AN Junling;see WANG Feng et al.;(6),1331-1342Ania POLOMSKA-HARLICK;see Jieshun ZHU et al.;(4),743-754Baek-Min KIM;see Seong-Joong KIM et al.;(4),863-878BAI Tao;see LI Gang et al.;(1),66-84BAO Qing;see YANG Jing et al.;(5),1147—1156BEI Naifang;  相似文献   

15.
正Journal of Meteorological Research is an international academic journal in atmospheric sciences edited and published by Acta Meteorologica Sinica Press,sponsored by the Chinese Meteorological Society.It has been acting as a bridge of academic exchange between Chinese and foreign meteorologists and aiming at introduction of the current advancements in atmospheric sciences in China.The journal columns include Articles.Note and Correspondence,and research letters.Contributions from all over the world are welcome.  相似文献   

16.
17.
自地球形成至寒武纪将近40亿年(距今46亿~5.4亿年,通常称为前寒武纪)的气候演变是一个具有特殊难度和挑战性的研究领域,同时也是基础和前沿的研究领域。文章选择了前寒武纪气候演化中的三个重要科学问题进行综述:大气演化、两次全球性的冰川期以及暗弱太阳问题。关于大气演化,本文首先描述了大气成分的演化历史,然后简述了影响大气成分演化的三个基本过程:大气逃逸、两次大气氧含量突然增加、碳酸盐-硅酸盐循环及其对气候系统的负反馈作用。两次全球性的冰川期分别发生在古元古代(距今24亿~21亿年)和新元古代(距今8亿~5.8亿年),文章简述了其成因以及相关的气候模拟结果。暗弱太阳问题是地球历史气候演化的一个经典问题,论文简要地综述了一些最新的研究成果和观点。  相似文献   

18.
淮河流域水文极值预测模型研究   总被引:1,自引:0,他引:1  
为探索气候变化影响下水文极值的非平稳性和预测方法,建立了水文极值非平稳广义极值(GEV)分布的统计预测模型。利用1952-2010年淮河上游流域累计面雨量和流量年最大值资料、同期500 hPa环流特征量资料以及17个CMIP5模式对环流特征量的模拟结果,筛选出对水文极值影响显著的年平均北半球极涡强度指数作为GEV分布参数的预测因子。分析了在RCP2.6、RCP4.5和RCP8.5情景下2006-2050年淮河上游流域水文极值对气候变化的响应。结果表明,10年以下与10年以上重现期的水文极值在非平稳过程中呈现前者下降而后者上升的相反变化趋势;多模型预测的集合平均在未来情景中均呈现上升趋势,情景排放量越大增幅越大,重现期越长增幅也越大。与极值的常态相比,极值的极端态更易受气候变化影响。  相似文献   

19.
Atmospheric Infra Red Sounder(AIRS) measurements are a valuable supplement to current observational data, especially over the oceans where conventional data are sparse. In this study, two types of AIRS-retrieved temperature and moisture profiles, the AIRS Science Team product(Sci Sup) and the single field-of-view(SFOV) research product, were evaluated with European Centre for Medium-Range Weather Forecasts(ECMWF) analysis data over the Atlantic Ocean during Hurricane Ike(2008) and Hurricane Irene(2011). The evaluation results showed that both types of AIRS profiles agreed well with the ECMWF analysis, especially between 200 h Pa and 700 h Pa. The average standard deviation of both temperature profiles was approximately 1 K under 200 h Pa, where the mean AIRS temperature profile from the AIRS Sci Sup retrievals was slightly colder than that from the AIRS SFOV retrievals. The mean Sci Sup moisture profile was slightly drier than that from the SFOV in the mid troposphere. A series of data assimilation and forecast experiments was then conducted with the Advanced Research version of the Weather Research and Forecasting(WRF) model and its three-dimensional variational(3DVAR) data assimilation system for hurricanes Ike and Irene. The results showed an improvement in the hurricane track due to the assimilation of AIRS clear-sky temperature profiles in the hurricane environment. In terms of total precipitable water and rainfall forecasts, the hurricane moisture environment was found to be affected by the AIRS sounding assimilation.Meanwhile, improving hurricane intensity forecasts through assimilating AIRS profiles remains a challenge for further study.  相似文献   

20.
The moving-window correlation analysis was applied to investigate the relationship between autumn Indian Ocean Dipole (IOD) events and the synchronous autumn precipitation in Huaxi region, based on the daily precipitation, sea surface temperature (SST) and atmospheric circulation data from 1960 to 2012. The correlation curves of IOD and the early modulation of Huaxi region’s autumn precipitation indicated a mutational site appeared in the 1970s. During 1960 to 1979, when the IOD was in positive phase in autumn, the circulations changed from a “W” shape to an ”M” shape at 500 hPa in Asia middle-high latitude region. Cold flux got into the Sichuan province with Northwest flow, the positive anomaly of the water vapor flux transported from Western Pacific to Huaxi region strengthened, caused precipitation increase in east Huaxi region. During 1980 to 1999, when the IOD in autumn was positive phase, the atmospheric circulation presented a “W” shape at 500 hPa, the positive anomaly of the water vapor flux transported from Bay of Bengal to Huaxi region strengthened, caused precipitation ascend in west Huaxi region. In summary, the Indian Ocean changed from cold phase to warm phase since the 1970s, caused the instability of the inter-annual relationship between the IOD and the autumn rainfall in Huaxi region.  相似文献   

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