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1.
全球气候正在经历快速、显著的变化,对许多领域产生了重大影响。气候变化极其复杂,包含季节至千年等不同时间尺度,其变化及机理存在较大差异。深入认识不同时间尺度的气候变化动力学过程与机理,实现古今气候的结合,是理解和应对全球及区域气候变化的关键。因此,为了更好地了解古今气候变化研究前沿及进展,特组织了“古今气候变化”专辑,共收集了11篇相关学术论文,以飨读者。 1.古气候中的沙尘变化及其气候影响 刘永岗等(2022)利用气候模式,针对前寒武时期、盘古超大陆时期、末次冰盛期和全新世中期的沙尘变化及其气候影响开展模拟研究,发现沙尘变化及其气候影响在上述时期之间存在较大差异。 2.青藏高原隆升气候效应的数值模拟研究进展概述 孙辉和刘晓东(2022)对有关青藏高原隆升气候效应的数值模拟研究进行了回顾,指出新生代以来青藏高原在隆升、生长和北移过程中,其动力和热力作用对东亚季风形成、南亚季风演化、内陆干旱化发展以及亚洲季风-干旱环境格局变迁都有重要影响。 3.上新世热带海道变化影响东亚气候的模拟研究 上新世早—中期热带海道变化对东亚气候的影响机理仍不清楚。谭宁等(2022)模拟了印尼海道收缩和巴拿马海道关闭对东亚气候的影响,指出热带海道的关闭/收缩导致东亚北部夏季气温降低、南部升高,冬季东亚大陆升温、降水减少。 4.第四纪两类千年尺度气候振荡现象及机理研究 张晓和张旭(2022)基于目前对DO和HS-DO两类千年事件的研究现状,总结了已有的可反映千年事件的重建数据,利用以往模拟工作回顾了现有的机制理论,评述了目前研究DO和HS-DO事件的局限性。 5.季节性海冰驱动的冰期北大西洋“电容器”效应 张旭等(2022)模拟了氧同位素3阶段的一个典型DO事件过程,探讨了冰阶冷期北大西洋气候变率的放大机制,表明北大西洋季节性海冰的存在可以调控海洋次表层热量积累释放的过程,产生“电容器”效应,这对理解冰期年际年代际气候变率放大现象有启示意义。 6.全新世亚洲季风百年-千年尺度变化的模拟研究进展 孙炜毅等(2022)从数值模拟的角度,回顾了全新世亚洲季风百年千年尺度变化的模拟工作,并从外强迫和内部变率这两个角度对机制进行了探讨,有助于深入理解全新世亚洲季风演变及机理。 7.全新世中期中国气候和东亚季风:PMIP4模式结果 田芝平等(2022)分析了多模式模拟的全新世中期中国气候和东亚季风变化,指出:全新世中期中国年和冬春季偏冷,夏秋季偏暖;降水、蒸发和有效降水的年变化较小,季节上均表现为冬春季减少,夏秋季增加;东亚冬、夏季风加强。 8.亚洲高山区全新世中期气候及其影响下的冰川模拟 燕青(2022)模拟了全新世中期亚洲高山区的气候变化,分析了亚洲高山区冰川变化及其区域性,探讨了温度和降水变化对冰川的作用,研究有助于加深理解全新世中期亚洲高山区冰川的变化格局和驱动机制。 9.陆面过程与天气研究 陈海山等(2022)从陆面基本要素、下垫面构成、陆面诱发的局地环流3个方面,回顾了土壤湿度、地形、土地利用、山谷-平原环流等要素和过程对强对流、暴雨、台风、高温热浪等天气事件影响研究的相关进展。 10.前冬戴维斯海峡—巴芬湾区域海冰异常对中国东部春季极端降水频次的可能影响及预测价值 张梦琪等(2022)的研究表明:前冬戴维斯海峡—巴芬湾区域海冰异常偏多时,北大西洋易出现经向三极型海温异常,该信号持续到春季并通过激发欧亚遥相关波列调制中国东部的动力和水汽条件,为春季极端降水发生提供有利背景环流。 11.中国区域性暴雨事件未来变化:RegCM4动力降尺度集合预估 周波涛等(2022)采用追踪式的客观识别方法,对中国区域性暴雨进行了识别,并从发生频次、持续时间、平均降水量、平均影响范围和综合强度5个方面预估了其未来变化,为应对气候变化提供了依据。  相似文献   

2.
上新世中期中国气候的数值模拟分析   总被引:2,自引:1,他引:1       下载免费PDF全文
姜大膀 《第四纪研究》2009,29(6):1033-1043
使用中国科学院大气物理研究所的全球大气环流模式,曾就上新世中期(距今约3百万年前)气候进行过数值模拟试验,在已有针对全球气候进行分析的工作基础上,集中研究了该地质时期我国气候的变化特征。数值试验结果表明,除了青藏高原地区由于地形海拔高度变化而引起的局地冷却现象以外,上新世中期我国约100°E以东地区地表气温上升4~8℃,升温中心位于江淮流域下游地区; 该经度线以西地区地表气温升幅相对要弱一些,在1~4℃之间。上新世中期年均降水在我国东部地区显著减少,平均减幅在0.5mm/天以上,特别是在长江中游地区; 新疆北部、青海和西藏大部年均降水略有增加,而新疆中部和南部年均降水略有减少。在对流层低层,上新世中期东亚冬季风系统减弱,夏季风系统总体上略有减弱; 在对流层中层,冬季东亚大槽显著减弱,夏季中高纬度地区500hPa位势高度升高。在以上结果中,上新世中期我国气候相对于现在偏暖、东亚冬季风强度减弱得到了代用资料的支持。  相似文献   

3.
PRECIS模式对宁夏气候变化情景的模拟分析*   总被引:2,自引:0,他引:2  
使用英国Hadley气候中心区域气候模式PRECIS,分析了B2温室气体排放情景下,相对于气候基准时段1961~1990年宁夏2071~2100年(2080s)地面气温、降水量等的变化。结果表明:PRECIS模式能够很好地模拟宁夏气温的分布特征,对夏季最高气温的模拟效果好于冬季最低气温;较好地模拟出了宁夏降水南多北少的空间差异特征,且对夏季降水的模拟能力明显强于年均降水和冬季降水。相对于气候基准时段, 在B2情景下,2080s宁夏年平均、冬季和夏季平均气温均明显上升,宁夏北部和南部的部分地区气温上升幅度最大,夏季平均气温和最高气温上升幅度大于冬季平均气温和最低气温;未来宁夏年、冬季和夏季平均降水较基准时段均有所增加,但降水随年代际却呈减少趋势,由于气温和降水的气候变率加大,2080s宁夏出现高温、干旱、洪涝等异常天气事件的可能性增大。  相似文献   

4.
利用美国国家大气研究中心(NCAR)的CCSM2.0全球气候系统模式,并结合重建的古地理资料,研究了晚白垩世(80Ma)东亚气候特征以及CO2浓度变化对东亚气候的影响。模拟结果表明: 与现代气候比较,晚白垩纪时期的东亚大陆冬季风和夏季风都偏强,具有同步变化的特点,并且中高纬度年平均地表气温明显增加,而低纬度地区有所下降,年降水变化的区域性特征明显; 就年平均而言,在 30°~40°N 的内陆地区地面净失去水分、变干燥,而在低纬度、大陆东岸以及高纬度地区,地表获得水分、变湿润。晚白垩纪CO2浓度变化对大气辐射和大气热状况的影响是复杂的; 降低CO2浓度可以导致东亚地区气候显著变化,冬季东亚中纬度地区大陆降温比其附近的海洋大,太平洋中高纬度的低压系统加强,因而造成东亚冬季风偏强; 而在夏季,中纬度大陆地区降温幅度大于海洋,西太平洋副热带高压减弱,因而夏季风减弱。对应于较低的CO2浓度,年降水量在东亚及其沿岸的中、低纬度大部分地区显著减少,在东亚高纬度的大陆和海洋上降水的减少幅度不大,而在 30°N 附近亚洲大陆中部和东部的一些地区降水有所增加; 总体上,地表水分收支在东亚大陆的东部都是以负值为主,地面净失去水分、变干燥,其中 30°N 以南的大陆沿岸最显著; 而在东亚大陆的内陆地区,水分收支差异以0~0.5mm/天的正值为主,东亚大陆的东部是以地面净得到水分、变潮湿为主。  相似文献   

5.
1936—2017年北极勒拿河流域气候变化及其对径流的影响   总被引:2,自引:2,他引:0  
胡弟弟  康世昌  许民 《冰川冻土》2020,42(1):216-223
北极河流径流的变化会影响海冰热力过程和海洋温盐环流。基于全球降水气候学中心(GPCC)及俄罗斯水文气象部提供的1936—2017年间的气温、 降水和径流数据, 分析了北极勒拿河(Lena River)流域近80年来的气候和径流变化特征, 并探究了气候变化对径流的影响。通过分析得出: 研究期内勒拿河流域气温上升0.18 ℃·(10a)-1, 降水量增加率为4.7 mm·(10a)-1, 径流增加399 m3·s-1·(10a)-1。各个季节的径流均呈增加趋势, 其中春季径流增加最为明显, 冬季次之。春季径流的增加主要是由春季气温升高所致的积雪加速消融造成的, 其次是春季降水的补给。夏、 秋季径流增加的主要原因是降水的贡献, 气温升高加剧蒸发反而使径流减少。冬季径流的增加, 是由于气温升高导致冻土退化或活动层厚度增加, 促进更多冻结水进入径流过程, 致使径流增加。  相似文献   

6.
末次盛冰期东亚气候的成因检测   总被引:4,自引:0,他引:4       下载免费PDF全文
在国际古气候模拟比较计划设置的标准试验方案下,首先利用中国科学院大气物理研究所的全球大气环流模式(IAP-AGCM)模拟了末次盛冰期东亚气候状况,然后通过4组数值敏感性试验逐一模拟了大气CO2浓度、海洋表面温度(SST)和海冰、陆地冰盖和地形、东亚植被变化4项强迫因子的单独气候效应,进而对末次盛冰期东亚气候的成因进行了检测。结果表明,末次盛冰期除华南局部略有升温外,中国年均地表气温显著降低,降温幅度总体上向北增大,青藏高原处存在一个降温中心。其中,SST和海冰变化是华南局部略偏暖的主因,它同时导致了东亚其他区域地表气温的显著降低,特别是在东北亚地区;陆地冰盖和地形变化对于东亚地表气温的显著冷却作用主要体现在东亚的西北部;大气CO2浓度降低会引起东亚地区0.2~0.9℃的普遍降温;相对而言,东亚植被的降温作用(0.5~1.0℃)主要显现在中国40°N以南的区域。与此同时,SST和海冰变化能引起中国东部年均降水一定程度的减少,而大气CO2浓度、陆地冰盖和地形、东亚植被单独变化均不会显著影响东亚年均降水的分布状况,然而,上述四项因子的共同变化会通过协同作用引起中国东部年均降水的显著减少,西部地区降水则与现在差别不大。此外,末次盛冰期东亚夏季风的显著减弱源于SST和海冰变化,冬季风变化则可归因于SST和海冰、陆地冰盖和地形的变化。  相似文献   

7.
回顾了课题组近年来有关末次冰盛期和中全新世气候模拟分析的研究进展,包括中国气候、东亚和全球季风以及相关的主要大气环流系统等变化。多模式试验数据的分析表明,末次冰盛期中国降温和年均有效降水变化与重建记录定性一致,但模拟幅度偏弱;中国冻土区扩张、永冻土区活动层变薄,中国西部冰川物质平衡线高度降低;东亚季风变化在不同模式间差异较大,中国季风区范围和季风降水减小,北半球陆地季风区南移、全球季风区缩小和降水强度减弱共同引起全球季风降水减少;全球降水和潜在蒸散发共同减小使得全球干湿变化总体很小;北半球西风带在高层北移、低层南移,热带宽度变化依赖于指标的选取,厄尔尼诺—南方涛动气候影响、热带太平洋沃克环流均减弱并东移。在中全新世,多模式模拟的中国年和冬季偏冷仍然与大部分重建记录显示的偏暖不同;东亚冬季风增强,东亚夏季降水变化存在空间不一致性;中国和全球尺度的季风区范围和季风降水均增加;东北多年冻土退化、青藏高原多年冻土向低海拔扩张,北半球永冻土区减小、季节性冻土扩张、冻土区北退、永冻土区活动层变厚;全球干旱区面积总体变化很小;夏季东亚西风急流显著减弱并北移,厄尔尼诺—南方涛动减弱,热带太平洋沃克环流...  相似文献   

8.
古气候重建和模拟研究相结合可有效揭示气候变化的机制,但针对东亚夏季风区的相关研究还有待深入。文章基于现代观测数据及古气候记录的定量化重建结果,评估过去21 ka气候瞬变模拟(Transient Climate Evolution simulation over last 21000 years,简称TraCE-21ka)对现代东亚气候及古夏季风演变的再现能力,对比分析其异同并探索东亚夏季风区南部(SEASM)和北部(NEASM)特征时期的气候变化及可能的驱动机制。结果表明:TraCE-21ka模拟和定量化重建结果相对一致,即末次冰盛期偏干冷,全新世早中期偏暖湿,但模拟的变化幅度小于重建。相对于SEASM,NEASM变化幅度较显著。同时,SEASM的温度及降水和NEASM的温度在整个全新世期间模拟和重建的结果一致性较高,但NEASM模拟和重建的降水在晚全新世一致而早全新世不一致。相对于重建降水的南部和北部显著不同步变化,即南部降水在早全新世高而北部在中全新世高,模拟降水的南、北差异性较小,且为全新世持续减弱夏季风演变的结果。这种重建与模拟间的不同可能来源于地表过程对气候演变敏感度的区域性差异,也可能来源于粗分辨率模拟所造成的系统性气候偏移。  相似文献   

9.
6kaB.P.东亚区域气候模拟及其变化机制探讨   总被引:17,自引:12,他引:5  
中全新世是地质历史上最近的温暖时期。文章利用包含较详细陆面过程的区域气候模式,通过分别加入现代植被和根据花粉化石资料转化的东亚地区古植被,模拟了6kaB.P.东亚季风气候,并研究了植被变化对东亚气候的影响。由区域气候模拟得到的较高分辨率的气候演变图像表明6kaB.P.太阳辐射季节循环增大,高纬度地区积雪、海冰减少,极地海洋升温,导致冬季大陆冷高压减弱,使中国冬季温度降低幅度大大减小。模拟中加入恢复的古植被造成地表反照率减小,使得冬季进一步升温,这不但突破了PMIP众多模拟的东亚6kaB.P.冬季降温的局限,而且使模拟温度变化的季节特征与古地质资料更为吻合。中全新世东亚大陆全年升温导致东亚夏季风强盛、冬季风减弱;降水及有效降水增加,降水带向西、向北扩张。与PMIP模拟相比,由于模式分辨率的提高,该工作模拟出了中国东部区域性降水增加的特征并得到了较为精细的气候变化空间分布。  相似文献   

10.
气候变化对地表水资源的影响   总被引:7,自引:0,他引:7  
总结了气候变化对水文水资源影响方面的研究方法, 分析了气候变化条件下水文水资源变化的研究现状和存在问题.并以山西省和黄河源区为研究对象, 以分布式水文模型为工具、GCMs输出的气候情景为输入条件, 针对不同的下垫面特征建立不同的分布式水文模型, 分别采用气候情景趋势分析结果和直接利用GCMs输出结果两类方法确定气候变化的数据源, 对研究区域未来的地表径流过程和地表水资源可能的变化趋势进行了研究.从气候情景的预测结果来看, 未来50年山西省的气温和降水都呈增加趋势, 但由于各自对水资源带来的影响不同, 将使山西省水资源呈现先增加后减少的趋势; 且由于冬季气温和降水的增幅比夏季大, 使得未来山西省的水资源年内分布有略微平缓的趋势.对黄河源区而言, 虽然未来100年内的降水和气温都呈增加趋势, 但由于降水增长引起的地表水资源的增加不足以抵消气温升高带来的影响, 因此将导致径流量不断降低的总体趋势, 并使径流年内分布略趋平缓, 而年际分布将越来越不均匀, 旱涝威胁日趋严峻.   相似文献   

11.
末次冰消期热带湖光岩玛珥湖古季风变化记录   总被引:4,自引:0,他引:4  
末次冰消期热带湖光岩玛珥湖沉积物高分辨率的生物硅、总有机碳、总氮和总氢等有机地化指标记录显示了一系列百年至千年尺度的快速变化 ,表明季风环流系统运行的强烈不稳定性。这种不稳定变化与格陵兰冰芯记录的气候事件相比较 ,表现出一定的遥相关 ,但也表现出了末次冰消期初始转暖低纬度区超前高纬度区的显著不同 ,这种变化可能与低纬度区热带水文循环的驱动作用相关  相似文献   

12.
The transition from the Last Glacial Maximum to the Holocene was an internal of climate variability that was characterised by large spatial and temporal variations. Here we show that deglaciation warming in the northern Indian Ocean was initiated ca. 19 ka, which is contemporary with deglaciation warming in the Antarctica and Southern Ocean. A gradual warming occurred during the glacial/Holocene transition in the northern Indian Ocean, unlike the two‐step warming seen in Greenland and the North Atlantic. Synchronous deglacial warming ca. 19 ka in Antarctica and the northern Indian Ocean suggests a strong connection in the propagation of climate signals between Antarctica and the Indian Ocean, probably through the Indonesian Throughflow and/or Subantarctic Mode Water. Copyright © 2010 John Wiley & Sons, Ltd.  相似文献   

13.
《Quaternary Science Reviews》2005,24(14-15):1547-1557
Correlation of paleoclimatic evidence with orbital changes shows that the build-up of polar ice accelerated when low obliquity coincided with perihelion in Northern Hemisphere winter. Under low obliquity the insolation was channeled to the tropics at the expense of both polar caps. As perihelion moved from winter solstice toward spring equinox, the solar beam in astronomic winter and spring became stronger than in summer and autumn. This orbital configuration under climate conditions like today would lead to warming of tropical oceans but cooling of the polar regions. The areally weighted global mean surface temperature, which is dominated by the low latitudes, would increase. Consequently, during the first millennia, the early glacial ice build-up was most likely accompanied by global warming. It was the associated increase of meridional insolation and temperature gradients, which were instrumental in the transition to a glacial.A significant part of the current global warming is due to the gradual temperature increase of the tropical oceans. As the changing orbital configuration today resembles that of the last interglacial/glacial transition, the warming is likely to have a natural component.  相似文献   

14.
Sudden stratospheric warming (SSW) events are identified to investigate their influence on the equatorial tropospheric climate. Composite analysis of warming events from Era-Interim (1979–2013) record a cooling of the tropical lower stratosphere with corresponding changes in the mean meridional stratospheric circulation. A cooling of the upper troposphere induces enhanced convective activity near the equatorial region of the Southern Hemisphere and suppressed convective activity in the off-equatorial Northern Hemisphere. After selecting vortex splits, the see-saw pattern of convective activity in the troposphere grows prominent and robust.  相似文献   

15.
Zeng  Yongyao  Gao  Lei  Zhao  Wenqing 《中国地球化学学报》2021,40(2):199-211

Global climate during the Jurassic has been commonly described as a uniform greenhouse climate for a long time. However, the climate scenario of a cool episode during the Callovian–Oxfordian transition following by a warming trend during the Oxfordian (163.53 to 157.4 Ma) is documented in many localities of the western Tethys. It is still unclear if a correlatable climate scenario also occurred in the eastern Tethys during the same time interval. In this study, a detailed geochemical analysis on the 1060 m thick successions (the Xiali and Suowa formations) from the Yanshiping section of the Qiangtang Basin, located in the eastern Tethys margin during the Callovian–Oxfordian periods, was performed. To reveal the climate evolution of the basin, carbonate content and soluble salt concentrations (SO42−, Cl) were chosen as climatic indices. The results show that the overall climate patterns during the deposition of the Xiali and Suowa formations can be divided into three stages: relatively humid (~ 164.0 to 160.9 Ma), dry (~ 160.9 to 159.6 Ma), semi-dry (~ 159.6 to 156.8 Ma). A similar warming climate scenario also occurred in eastern Tethys during the Callovian–Oxfordian transition (~ 160.9 to 159.6 Ma). Besides, we clarify that the Jurassic True polar wander (TPW), the motion of the lithosphere and mantle with respect to Earth’s spin axis, inducing climatic shifts were responsible for the aridification of the Qiangtang Basin during the Callovian–Oxfordian transition with a review of the paleolatitude of the Xiali formation (19.7 + 2.8/−2.6° N) and the Suowa formation (20.7 + 4.1/−3.7° N). It is because the TPW rotations shifted the East Asia blocks (the North and South China, Qiangtang, and Qaidam blocks) from the humid zone to the tropical/subtropical arid zone and triggered the remarkable aridification during the Middle-Late Jurassic (ca. 165–155 Ma).

  相似文献   

16.
Two sediment cores recovered from Dahu Swamp, which is located in eastern Nanling Mountains in south China, were selected for investigation of palaeoclimatic changes. Multi‐proxy records of the two cores including lithological variation, organic carbon isotope ratio, dry bulk density, organic matter content, magnetic susceptibility, humification degree, median grain size and geochemical proxies reveal that during the last deglaciation three drier phases correspond to the Oldest, Older and Younger Dryas cooling events, and the intercalated two wetter phases synchronise with the Bølling and Allerød warming events. The Holocene Optimum, which was resulted from a strengthening of the East Asian (EA) summer monsoon, occurred in the early and mid Holocene (ca. 10–6 cal. ka BP). In the mid and late Holocene (ca. 6–3 cal. ka BP), a prevailing dry climate suggested a weakening of the EA summer monsoon. The general trend of Holocene climatic changes in this study agrees with the 25° N summer solar insolation, suggesting that orbitally induced insolation may have played an important role in the Holocene climate in the study region. Copyright © 2010 John Wiley & Sons, Ltd.  相似文献   

17.
By EOF, Power spectrum and nonlinear mapping methods, the temperature time series of May to July in Jianghuai river basins from 1948-2014 (67 years) were objectively divided into several climate stages. The time series were divided into three climate stages with similar lengths: the stage with its air temperature trend going downwards stage (1948-1970); the stage with its air temperature trend going upwards (1971-1994) and the stage with its air temperature trend going gentle upwards (1995-2014). Their climate characteristics can be quantified by a special climate index. Then, the statistic characteristics of Jianghuai cyclones in the three climate stages were compared with the cooling or warming trends. The results showed that characteristic evolutions of the frequency of yearly average of Jianhuai cyclones, the cyclones with their life cycles in the area longer than 48h, the cyclones with three types of thickness, shallow and bottom shapes classified according to the cyclone height, the cyclones with three kinds of zonal, meridional, and circular trajectory, responded to the temperature changing trends in the three climate stages. The cooling trends of the stage temperature restrained the activity of Jianghuai cyclones, and the warming trends of the stage temperature promoted the cyclone’s development, maintaining, activity, and also led cyclone moving towards to north further. The composite analysis of cyclone structures showed that the evolution characteristics in the center intensity, temperature grads, the maxima velocity of jet of the cyclones, and the intensity, length and position of the vapor flux passage of the Jianghuai cyclones, also the intensity, thickness, the positions of the warm and cold air masses within the cyclones, all responded to the trend change of stage temperature including cooling, warming and gentle warming. The results show clearly that temperature cooling reduces the intensity of cyclone structures and restrains the activity of cyclones in the temperatures trend down stage. The temperature warming enhances the stable development and strengthening of cyclone structure,and maintains the activity of cyclones in the temperature warming stages.  相似文献   

18.
The influence of the geomagnetic field on climate, a long hotly disputed issue, was examined for the Matuyama–Brunhes (MB) magnetic polarity transition using palynological and paleomagnetic data sets from a high accumulation rate (ca. 50 cm/kyr) sediment core from Osaka Bay. During the period from marine oxygen isotope stages (MIS) 20 to 18, climate change is well correlated with global ice volume variation in the precession cycle, with the exception of the early half of MIS 19. The postglacial warming after substage 20.2 was interrupted by cooling that began just before the sea-level highstand correlated with substage 19.3 and persisted until about a mid-point between 19.3 and 19.2, followed by a rapid warming. The thermal maximum clearly postdates the highest sea-level highstand by 6–7 kyr, and the connection between orbital forcing and climate was disrupted. The cooling event coincided with the center of the paleointensity low during the MB transition. This unusual climate cooling across a sea-level peak is very likely related to the field intensity decrease. The data from Osaka Bay may suggest an instance where the geomagnetic field has influenced climate in the past.  相似文献   

19.
The transition area of three natural zones (Eastern Monsoon Region, Arid Region of Northwest China, Qinghai Tibet Plateau Region) is influenced by the Asian monsoon and middle latitude westerly circulation because of its special geographical position. And it is more sensitive to global climate change. The Koppen climate classification, which is widely used in the world, and the accumulated temperature-dryness classification, which is usually used in China, were used to study the climate zones and changes in the region of longitude 97.5°~108°E, latitude 33°~41.5°N, from 1961 to 2010. The changing areas of each climate zone were compared to the East Asian Summer Monsoon index, the South Asian Summer Monsoon index, the Summer Westerly index, the East Asian Winter Monsoon index, the Plateau Summer Monsoon index, the North Atlantic Oscillation index, the Southern Oscillation index, NINO3.4 index, to explore the response of the transition area of three natural zones to each climate system. According to the results, this region will become wetter when the Summer Westerly or the East Asian Winter Monsoon is relatively strong. When the East Asian Summer Monsoon or the South Asian Summer Monsoon becomes strong, the climate in low altitude region of the study area will easily become drier, and the climate in high altitude region of the study area is easily to become wetter. When the Plateau Summer Monsoon is relatively strong, the climate in the study area will easily become drier. When the North Atlantic Oscillation is relatively strong, the study area will easily become wetter. And when the El Niño is relatively strong, or the Southern Oscillation is relatively weak, the study area will easily become drier. In general, the moisture status of this region is mainly controlled by the middle latitude westerly circulation. The enhancement of the Asian summer monsoon could increase the precipitation in the southeast part of this regional, but, according to the degrees of dryness and the types of climate change in this paper, warming effects could offset precipitation increasing and make the area drier. The transition area of three natural zones is influenced by multiple interactions of climate systems from East Asia. A single climatic index, such as air temperature or precipitation, can not completely represent the regional features of climate change. As a result, areas of climate zones can be used as an important index in the regional climate change assessment.  相似文献   

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