中国夏季气候对植被覆盖的影响:1982～2001(英文)     

HABIB Aziz Salim  陈晓玲  龚健雅  张力 《地球空间信息科学学报》2009,(1)

In this paper, we apply lagged correlation analysis to study the effects of vegetation cover on the summer climate in different zones of China, using NOAA/AVHRR normalized difference vegetation index (NDVI) data during the time period from 1982 to 2001 and climate data of 365 meteorological stations across China (precipitation from 1982 to 2001 and temperature from 1982 to 1998). The results show that there are positive correlations between spring NDVI and summer climate (temperature and precipitation) in m...  相似文献   

海藻可延缓气候变暖     

《国土资源》2009,(1)

日前，一只研究队伍乘英国皇家海军勘察船“忍耐号”在南极海域进行科考时有了新的发现：当冰山消融的时候，就有铁质颗粒被释放进海洋里，铁质颗粒是海藻的营养物质，海藻的生长能够吸收大量的二氧化碳，然后海藻沉入海底，将有害的温室气体在深海里羁留数百年。  相似文献   

CHARACTERISTICS OF ZONAL ANOMALY OF ANNUAL PRECIPITATION IN THE NORTHEASTERN CHINA     

YANMin-hua DENGWei CHENPan-qin LIANGLi-qiao 《中国地理科学(英文版)》2004,14(4):320-325

The characteristics of zonal anomaly and change rule of temporal distribution of annual precipitation in the northeastern China are revealed in this paper with EOF (Empirical Orthogonal Function) and REOF (Rotated Empirical Orthogonal Function) methods and results are drawn in the standard relief maps with GIS technology for practical application. Data used in the study were obtained from 208 meteorological stations over the northeastern China from 1961 to 2001. EOF results show that the first 3 loading vectors could give entire spatial anomaly structure of annual precipitation. In the Northeast Plain including the Songneng Plain and the Liaohe Plain, there is a regional compatibility (whether wet or dry) of annual precipitation change and this precipitation pattern has occurred since the late 1980s to the present. There also exist annual precipitation patterns of wet (or dry) in south and dry (or wet) in north and wet (or dry) in east and dry (or wet) in west. REOF results display 8 principal precipitation anomaly areas by the first 8 rotated loading vectors: the west plain, the Liaodong hills, the Sanjiang Plain, the Liaoxi hills,the Changbai Mountains, the Hulun Buir Plateau, the southwest plateau and the Liaodong Peninsula.  相似文献   

气候的变暖导致青藏高原冻土呈逐渐退化趋势     

《国土资源》2004,(12):50

受全球气候变暖的影响，青藏高原冻土近年呈逐渐退化趋势。在退化过程中，冻土涵养水源的功能减弱或丧失，从而引发和加剧了青藏高原高寒草地的退化，并有可能造成青藏高原生态的进一步恶化。  相似文献   

关于中国沙漠与黄土形成的古地理背景   总被引：1，自引：1，他引：0  

杨达源 《干旱区地理》1987,(1)

本文根据近几十年来的有关研究成果,提出中国沙漠与黄土堆积的起源和发展,不仅是新生代以来的全球性气候变化的产物,也与中国北方特殊的构造地貌发展变化有关;我国北方出现的沙漠扩展和尘暴频发,不仅是不合理开发的结果,也与现今全球性气候转冷以及地形的气候效应有关。  相似文献   

ESTIMATE OF METHANE EMISSIONS FROM RICE FIELDS IN CHINA BY CLIMATE-BASED NET PRIMARY PRODUCTIVITY     

KANG Guo-ding    CAI Zu-cong  ZHANG Zi-heng    XIAO Peng-feng 《中国地理科学(英文版)》2004,14(4):326-331

1INTRODUCTIONIrrigated ricefieldsarecharacterizedbylargespatialandtemporalvariationsin CH4 emissiontotheatmo-sphere.Accordingly,thereisagreatuncertaintyintheestimate ofCH4 emissionsfromricefields.GreateffortshavebeenmadetoestimatetheCH4 emissionsfromricefieldsandseveralapproacheshavebeendeveloped.TherepresentativemethodsincludetheIPCC(Inter-governmentPanelofClimateChange)region-specificemissionfactormethodandthemodelcalculationmethod.Toimprovethecalculationaccuracy,theIPCCmethodreq…  相似文献   

棉铃虫发生发展与气候条件的关系研究进展     

黄健  健 《沙漠与绿洲气象(新疆气象)》2024,18(1):1-11

棉铃虫Helicoverpa armigera 属鳞翅目夜蛾科，是一种世界性的重大害虫，在世界各地均有分布。因其具有远距离迁飞，繁殖力强等特点，条件适宜时常大面积暴发成灾，给农业生产带来较大损失。摸清棉铃虫生活习性、种群变化规律是棉铃虫防治的前提条件。由于棉铃虫是变温昆虫，气候条件对其生长发育、成灾机制等产生极大影响。因此，本文系统综述了气候变暖对棉铃虫影响的研究进展，包括棉铃虫生长发育、体色变化、繁殖、滞育、飞行、越冬、与作物的互作关系等方面，并对未来研究重点进行了展望。以期对棉铃虫的综合治理提供理论依据。  相似文献   

Modeling Arctic Ocean heat transport and warming episodes in the 20th century caused by the intruding Atlantic Water     

Jun Takahashi  Tatsuo Suzuki  Igor V Polyakov  Kohei Mizobata  Moto Ikeda  Fancois J.Saucier  Markus Meier 《极地研究(英文版)》2008,19(2):159-167

This study investigates the Arctic Ocean warming episodes in the 20th century using both a high-resolution coupled global climate model and historical observations. The model, with no flux adjustment, reproduces well the Atlantic Water core temperature （AWCT） in the Arctic Ocean and shows that four largest decadalscale warming episodes occurred in the 1930s, 70s, 80s, and 90s, in agreement with the hydrographic observational data. The difference is that there was no pre-warming prior to the 1930s episode, while there were two pre-warming episodes in the 1970s and 80s prior to the 1990s, leading the 1990s into the largest and prolonged warming in the 20th century. Over the last century, the simulated heat transport via Fram Strait and the Barents Sea was estimated to be, on average, 31.32 TW and 14.82 TW, respectively, while the Bering Strait also provides 15.94 TW heat into the west- ern Arctic Ocean. Heat transport into the Arctic Ocean by the Atlantic Water via Fram Strait and the Barents Sea correlates significantly with AWCT （ C = 0.75 ） at 0- lag. The modeled North Atlantic Oscillation （NAO） index has a significant correlation with the heat transport （ C = 0.37 ）. The observed AWCT has a significant correlation with both the modeled AWCT （ C =0.49） and the heat transport （ C =0.41 ）. However, the modeled NAO index does not significantly correlate with either the observed AWCT （ C = 0.03 ） or modeled AWCT （ C = 0.16 ） at a zero-lag, indicating that the Arctic climate system is far more complex than expected.  相似文献   

气候的冰年表     

朱佛宏 《海洋地质前沿》2009,25(4):42-42

2006年4月由日本国家极地研究所冰川研究工作者采自南极洲的冰年龄为100万年。与已揭露的最近65000年大气动力学的埃比克（Э∏ик）计划所获得的钻探资料相比，采白深度超过3000m钻孔的该冰岩心将已有的气候研究史扩展了20000年。但是预期，这个新记录将被打破，国为很快将获得年龄为120万年的冰岩心。  相似文献   

Impacts of Climatic Factors on Runoff Coefficients in Source Regions of the Huanghe River   总被引：4，自引：0，他引：4  

CHEN Liqun LIU Changming LI Yanping WANG Guoqiang 《中国地理科学(英文版)》2007,17(1):047-055

Runoff coefficients of the source regions of the Huanghe River in 1956–2000 were analyzed in this paper. In the 1990s runoff of Tangnaihai Hydrologic Station of the Huanghe River experienced a serious decrease, which had at- tracted considerable attention. Climate changes have important impact on the water resources availability. From the view of water cycling, runoff coefficients are important indexes of water resources in a particular catchment. Kalinin baseflow separation technique was improved based on the characteristics of precipitation and streamflow. After the separation of runoff coefficient (R/P), baseflow coefficient (Br/P) and direct runoff coefficient (Dr/P) were estimated. Statistic analyses were applied to assessing the impact of precipitation and temperature on runoff coefficients (including Dr/P, Br/P and R/P). The results show that in the source regions of the Huanghe River, mean annual baseflow coefficient was higher than mean annual direct runoff coefficient. Annual runoff coefficients were in direct proportion to annual pre- cipitation and in inverse proportion to annual mean temperature. The decrease of runoff coefficients in the 1990s was closely related to the decrease in precipitation and increase in temperature in the same period. Over different sub-basins of the source regions of the Huanghe River, runoff coefficients responded differently to precipitation and temperature. In the area above Jimai Hydrologic Station where annual mean temperature is –3.9oC, temperature is the main factor in- fluencing the runoff coefficients. Runoff coefficients were in inverse relation to temperature, and precipitation had nearly no impact on runoff coefficients. In subbasin between Jimai and Maqu Hydrologic Station Dr/P was mainly affected by precipitation while R/P and Br/P were both significantly influenced by precipitation and temperature. In the area be-tween Maqu and Tangnaihai hydrologic stations all the three runoff coefficients increased with the rising of annual precipitation, while direct runoff coefficient was inversely proportional to temperature. In the source regions of the Huanghe River with the increase of average annual temperature, the impacts of temperature on runoff coefficients be-come insignificant.  相似文献