基于CRU_TS4.0数据、东亚夏季风指数和南亚夏季风指数,使用偏相关分析方法,分析青藏高原1970-2014年间夏季(6-8月)降水的变化趋势及其对东亚夏季风(EASM)和南亚夏季风(SASM)响应的格局。结果表明:SASM与青藏高原夏季降水显著性相关的范围要明显大于EASM,SASM正相关区域位于青藏高原南部地区,负相关区域位于正相关区域外围、高大山体后部的高原西缘、中部和北部地区。EASM与高原夏季降水正相关区域集中分布于柴达木盆地,负相关区域面积较大,主要位于高原的中部和西部地区。
Influence of East Asian summer monsoon (EASM) and South Asian summer monsoon (SASM) on summer precipitation in Qinghai-Tibetan Plateau was evaluated, based on dataset CRU_TS4.0, East Asian summer monsoon index (EASMI), and South Asian summer monsoon index (SASMI). By using partial correlation method, the tempo-spatial pattern of summer precipitation in the region was also examined. The results showed that SASM was associated with much larger area than EASM.SASM was positively correlated with precipitation in part of the southern plateau,while was negatively correlated with the middle, the north, and the west of the plateau. Positive correlation between EASM and precipitation was found in Qaidam Basin and surrounding regions.
[1] 毕思文.全球变化与地球系统科学统一研究的最佳天然实验室——青藏高原[J].系统工程理论与实践,1997,5(5):72-77.
[2] 潘保田,李吉均.青藏高原:全球变化的驱动机与放大器[J].兰州大学学报(自然科学版),1996,32(1):108-115.
[3] 齐冬梅,李跃清.青藏高原季风研究主要进展及其科学意义[J].干旱气象,2007,25(4):74-79.
[4] 吴国雄,何编,刘屹岷,等.青藏高原和亚洲夏季风动力学研究的新进展[J].大气科学,2016,40(1):22-32.
[5] 简茂球,罗会邦.1998年青藏高原东部及其邻近地区大气热源与南海夏季风的关系[J].高原气象,2001,20(4):381-387.
[6] 赵声蓉,宋正山,纪立人.青藏高原热力异常与华北汛期降水关系的研究[J].大气科学,2003,27(5):881-893.
[7] Wei N, Gong Y F, He J H. Structural variation of an atmospheric heat source over the Qinghai-Xizang Plateau and its influence on precipitation in northwest China[J]. Advances in Atmospheric Sciences, 2009, 26(5):1027-1041.
[8] Tao S Y, Chen L X. A review of recent research on the East Asian summer monsoon in China[M]. Monsoon Meteorology. Oxford:Oxford University Press, 1987:60-92.
[9] 刘晓东,张敏锋,惠晓英.青藏高原当代气候变化特征及其对温室效应的响应[J].地理科学,1998,18(2):113-121.
[10] 王可丽,江颧,赵红岩.西风带与季风对中国西北地区的水汽输送[J].水科学进展,2005,16(3):432-438.
[11] 高登义.雅鲁藏布江水汽通道考察研究[J].自然杂志,2008,30(5):301-303.
[12] Gao Y H, Guo L, Zhang Y X. Changes in moisture flux over the Tibetan Plateau during 1979-2011 and possible mechanisms[J]. Journal of Climate, 2014, 27(5):1876-1893.
[13] 田立德,马凌龙,余武生,等.青藏高原东部玉树降水中稳定同位素季节变化与水汽输送[J].中国科学D辑:地球科学,2008,38(8):986-992.
[14] 张镱锂,李炳元,郑度,等.论青藏高原范围与面积[J].地理研究,2002,21(1):1-8.
[15] 张继承,姜琦刚,李远华,等.近50年柴达木盆地湿地变迁及其气候背景分析[J].吉林大学学报(地球科学版),2007,37(4):752-758.
[16] 闻新宇,王绍武,朱锦红.英国cru高分辨率格点资料揭示的20世纪中国气候变化[J].大气科学,2006,30(5):894-904.
[17] Delworth T L, Zeng F R. Regional rainfall decline in Australia attributed to anthropogenic greenhouse gases and ozone levels[J]. Nature Geoscience, 2014, 7(8):583-587.
[18] Li J P, Zeng Q C. A unified monsoon index[J]. Geophysical Research Letters, 2002, 29(8):1274.
[19] Li J P, Zeng Q C. A new monsoon index and its inter-annual variability and relation with monsoon precipitation[J]. Climatic and Environmental Research, 2005, 10(3):351-365.
[20] 徐建华.现代地理学中的数学方法[M].北京:高等教育出版社,2002.
[21] Dong W H. Summer rainfall over the southwestern Tibetan Plateau controlled by deep convection over the Indian subcontinent[J]. Nature Communications, 2016,7:1-9.
[22] 李林,申红艳,李红梅,等.柴达木盆地气候变化的区域显著性及其成因研究[J].自然资源学报,2015,30(4):641-650.
[23] 郑度,姚檀栋.青藏高原隆升与环境效应[M].北京:科学出版社,2004.
[24] Shi H Y, Li T J, Wei J H. Evaluation of the gridded CRU TS precipitation dataset with the point raingauge records over the three-river headwaters region[J].Journal of Hydrology, 2017, 548:322-332.