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SRES A2情景下未来30年我国东部夏季降水变化趋势
Summer Precipitation Change over Eastern China in Future 30 Years Under SRES A2 Scenario
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摘要: 采用与全球海气耦合模式 (NCC/IAPT63) 嵌套的区域气候模式 (RegCM2_NCC), 对东亚区域进行了30年的气候积分 (1961—1990年), 作为控制试验的气候背景场, 在此基础上, 在IPCC第三次评估报告SRES排放情景A2下对我国未来30年 (2001—2030年) 的气候变化趋势进行了预估, 重点分析了我国东部季风区夏季降水的变化趋势及区域特征。结果显示:未来30年夏季平均降水量在北部地区呈现增加的趋势, 以降水量距平代表的夏季主要雨带转到长江以北地区, 且北方地区降水量增加主要以对流性降水量增加为主, 长江以南地区降水量有所减少, 特别是华南地区降水量减少较为明显, 据此预测结果, 未来30年华北地区夏季干旱可能有所缓解。未来30年夏季低层空气湿度也将发生明显变化, 主要表现为中高纬度地区湿度增大, 较低纬度地区湿度减小, 东亚夏季风有所增强, 特别是西南气流明显加强, 有利于暖湿空气向北方地区输送。由于预估结果的可信度取决于全球模式和区域模式的模拟性能以及温室气体排放浓度的准确性, 因此还需要更多的试验及进一步的综合比较, 以减少未来气候变化趋势预估的不确定性。Abstract: By using the nested regional climate model (NCC/IAP T63-RegCM_NCC), climate change over China during the past 30 years (1961 —1990) is simulated as the control run of the climatic background.Based on it, under the IPCC SRES A2 emission scenario, projection is made over East Asia with the aim of examining climate change scenarios for the future 30 years (2001—2030).The changes of summer precipitation are analyzed, with the key focus on the eastern China monsoon regions.The results show that, due to the effect of greenhouse gas increase, the summer mean precipitation presents increasing trend over northern regions but decreasing over southern regions.The summer rain belts expressed by rainfall departure are expected to shift to the North of Yangtze River.Furthermore, the increase of the total precipitation over northern regions is mainly caused by the increase of convective precipitation, with non-convective precipitation unchanged.With regard to the climate field of 1961—1990, annual mean precipitation in North China (35°—40°N, 110°—120°E) shows less increase by 2%—3% in the next 30 years, but summer mean precipitation is expected to increase remarkably with the maximum precipitation variability of about 19%.Based on the projection, drought over North China in summer is expected to be relieved to some extent in the next 30 years.Summer mean air moisture (especially in lower-layers) is also expected to change obviously in the future, with the atmosphere becoming wetter in mid-high latitude but drier in low latitude regions. East Asian summer monsoon will be much intensive during 2001 —2030.The southwesterly airflow is expected to be enhanced in eastern monsoon regions, which would lead to more warm and wet moisture transporting to the regions of northern China and then increasing the precipitation over that region.Considering the reliability of the projection mainly lies on the capability of the global and regional models as well as the reliability of greenhouse gases concentration, further experiments and integrated comparisons need to be done in the future.Based on the constant improvement of the GCM and RCM, the optimized schemes and the appropriate emission scenarios relative to the different research aim are needed to be chosen.Furthermore, other kinds of the greenhouse gases and aerosols also should be included in the model to decrease the uncertainties in the future climate projection.
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图 1 2001-2030年平均降水量相对于1961-1990年的变化率（单位：%）
Fig. 1 Precipitation variability during 2001-2030 relative to 1961-1990(unit:%)
图 2 夏季平均降水量相对于1961-1990年的变化率（单位：%）
Fig. 2 Summer mean precipitation variability relative to 1961-1990(unit:%)
图 3 我国东部地区降水相对于1961-1990年变化的时间-经向剖面 (单位:mm/d)
Fig. 3 Meridion-time section of mean precipitation change over eastern China relative to 1961-1990(unit:mm/d)
图 4 2010年我国东部地区降水相对于1961-1990年变化的时间-经向剖面 (单位:mm/d)
Fig. 4 Meridion-time section of mean precipitation change in 2010 over eastern China relative to 1961-1990(unit:mm/d)
图 5 2001-2030年区域平均降水量变化曲线 (单位:%)
Fig. 5 Time series of precipitation variability during 2001-2030(unit :%)
图 6 850hPa夏季平均风场相对于1961-1990年变化（阴影区为青藏高原）
Fig. 6 The change of 850 hPa summer mean wind relative to 1961-1990(shaded area denotes Tibetan Plateau)
图 7 我国东部地区相对湿度相对于1961-1990年变化的经向-高度剖面（单位：10-3 kg/kg）
Fig. 7 Meridion-height sections of summer mean moisture change over eastern China relative to 1961-1990(unit:10-3 kg/kg)
图 8 2001-2030年夏季平均整层水汽输送相对于1961-1990年的变化（单位:g·s-1·cm-1）
Fig. 8 Changes of summer mean vertical integrated moisture transport during 2001-2030 relative to 1961-1990(unit:g·s-1·cm-1)
表 1 夏季平均降水量变化率 (单位:%)
Table 1 The summer mean precipitation variability (unit:%)
表 2 夏季平均西南季风指数
Table 2 The summer mean southwesterly wind index
表 3 夏季平均东南季风指数
Table 3 The summer mean southeasterly wind index
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[1] IPCC. Summary for Policymakers // Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge: Cambridge University Press, 2007 [2] Ding Yihui, Ren Guoyu, Zhao Zongci, et al. Detection, causes and projection of climate change over China: An overview of recent progress. Adv Atmos Sci, 2007, 24(6): 954-971 doi: 10.1007/s00376-007-0954-4 [3] 王会军, 曾庆存,张学洪.CO2含量加倍引的气候变化的数值模拟研究.中国科学(B辑), 1992, (6):663-672 http://www.cqvip.com/Main/Detail.aspx?id=985662 [4] 王绍武, 赵宗慈.未来50年中国气候变化趋势的初步研究.应用气象学报, 1995, 6(3):333-342 http://qikan.camscma.cn/jams/ch/reader/view_abstract.aspx?file_no=19950352&flag=1 [5] Guo Yufu, Yu Yongqiang, Liu Xiying, et al. Simulation of climate change induced by CO2 increasing for East Asia with IAP/LASG model. Adv Atmos Sci, 2001, 18(1) : 53-66 doi: 10.1007/s00376-001-0004-6 [6] 徐影, 丁一汇, 赵宗慈.近30年人类活动对东亚地区气候变化影响的检测与评估.应用气象学报, 2002, 13(5):513-525 http://qikan.camscma.cn/jams/ch/reader/view_abstract.aspx?file_no=20020569&flag=1 [7] 徐影, 丁一汇, 赵宗慈.长江中下游地区21世纪气候变化情景预测.自然灾害学报, 2004, 13(1):25-31 http://www.cnki.com.cn/Article/CJFDTOTAL-ZRZH200401004.htm [8] 许吟隆, 薛峰, 林一骅.不同温室气体排放情景下中国21世纪地面气温和降水变化的模拟分析.气候与环境研究, 2003, 8(2):209-217 http://www.cnki.com.cn/Article/CJFDTOTAL-QHYH200302007.htm [9] 姜大膀, 王会军, 郎咸梅.SRES A2情景下中国气候未来变化的多模式集合预测结果.地球物理学报, 2004, 47(5):776-784 http://www.cnki.com.cn/Article/CJFDTOTAL-DQWX200405006.htm [10] 张英娟, 董文杰, 俞永强, 等.中国西部地区未来气候变化趋势预测.气候与环境研究, 2004, 9(2):342-349 http://www.cnki.com.cn/Article/CJFDTOTAL-QHYH200402009.htm [11] 姜允迪.近五十年来我国气候带、季节等对全球变化暖的响应及未来演变趋势研究.北京:中国科学院研究生院, 2005 [12] 石广玉, 郭建东, 樊小标, 等.近百年全球平均气温变化的物理模式研究.科学通报, 1996, 41(18):1681-1684 http://www.cnki.com.cn/Article/CJFDTOTAL-KXTB199618014.htm [13] 徐影.人类活动对气候变化影响的数值模拟研究.北京:中国气象科学研究院, 2002 [14] 高学杰, 赵宗慈, 丁一汇, 等.温室效应引起的中国区域气候变化的数值模拟Ⅱ:中国区域气候的可能变化.气象学报, 2003, 61(1):29-37 http://www.cnki.com.cn/Article/CJFDTOTAL-QXXB200301003.htm [15] 许吟隆, 张勇, 林一骅, 等.利用PRECIS分析SRES B2情景下中国区域的气候变化响应.科学通报, 2006, 51(17):2068-2074 http://www.cnki.com.cn/Article/CJFDTOTAL-KXTB200617016.htm [16] IPCC. Climate change 2001: The Scientific Basis. Cambridge : Cambridge University Press, 2001 [17] Giorgi F, Arinucci M, Bates G T. Development of a second-generation regional climate model (RegCM2). Part Ⅰ: Boundary-layer and radiative transfer processes. Mon Wea Rev, 1993, 121:2794-2813 doi: 10.1175/1520-0493(1993)121<2794:DOASGR>2.0.CO;2 [18] Giorgi F, Arinucci M, Bates G T. Development of a second-generation regional climate model (RegCM2). Part Ⅱ: Convective processes and assimilation of lateral boundary conditions. Mon Wea Rev, 1993, 121:2814-2832 https://www.researchgate.net/publication/259222743_Development_of_a_Second-Generation_Regional_Climate_Model_RegCM2_Part_II_Convective_Processes_and_Assimilation_of_Lateral_Boundary_Conditions [19] 丁一汇, 钱永甫颜宏, 等.高分辨率区域气候模式的改进及其在东亚持续性暴雨事件模拟中的应用//国家“九五”重中之重项目执行专家组编.短期气候预测业务动力模式的研制[C].北京:气象出版社, 2000.217-231 [20] Ding Yihui, Liu Yiming, Shi Xueli, et al. Multi-year simulations and experimental seasonal predictions for flooding seasons in China by using a nested regional climate model (RegCM_NCC). Part Ⅱ: The experimental seasonal prediction. Adv Atmos Sci, 2006, 23(4) :487-503 doi: 10.1007/s00376-006-0487-2 [21] 李巧萍, 丁一汇.区域气候模式对东亚季风和中国降水的多年模拟与性能检验.气象学报, 2004, 62(2):140-153 http://www.cnki.com.cn/Article/CJFDTOTAL-QXXB200402001.htm [22] Li Qiaoping, Ding Yihui, Dong Wenjie, et al. A numerical study on the winter monsoon and cold surge over East Asia. Adv Atmos Sci, 2007, 24(4): 664-678 doi: 10.1007%2Fs00376-007-0664-y [23] 刘一鸣, 丁一汇, 李清泉.区域气候模式对中国夏季降水的10年回报试验及其评估分析.应用气象学报, 2005, 16(增刊):41-47 http://www.cnki.com.cn/Article/CJFDTOTAL-YYQX2005S1004.htm [24] 乔云亭, 陈烈庭, 张庆云.东亚季风指数的定义及其与中国气候的关系.大气科学, 2002, 26(1):69-81 http://www.cnki.com.cn/Article/CJFDTOTAL-DQXK200201006.htm -
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