何维帅,龙景超,朱陵晶,庄淑淇,徐海,张树钦,薛宇峰,徐建军

• 1:广东海洋大学海洋与气象学院/南海海洋气象研究院
• 2:中国气象局-广东海洋大学南海海洋气象联合实验室
• 3:广东省高等学校陆架及深远海气候
• 4:资源与环境重点实验室

摘要(Abstract)：

【目的】探究春季青藏高原感热异常对同期副热带东北太平洋（Subtropical Northeastern Pacific, SNEP）低云量的影响。【方法】基于卫星观测和再分析资料，采用回归分析、相关分析、合成分析以及模式模拟等方法，分析青藏高原感热与SNEP低云量的关系。【结果与结论】（1）青藏高原感热和SNEP低云量奇异值分解的第一模态方差贡献率为33.76%，时间序列相关系数达0.84。（2）春季青藏高原地表感热异常增加时，大气环流异常自青藏高原到SNEP呈现“+-+-+”的准正压波列状结构。SNEP异常反气旋环流会加强北太平洋副热带高压强度，使其向东北移动。同时，异常正压反气旋环流加强下沉运动，大气低层逆温层强度加强，低云高度降低。（3）反气旋环流东南侧的东北风异常加速背景风速，导致海表感热增加，海气界面稳定度减弱，湍流混合运动加强，因此有利于海面向云层输送水汽，促使低云量增加。（4）青藏高原感热异常强年的响应显著大于弱年，体现不对称性。本研究探究青藏高原与SNEP低云变异的物理联系，可为SNEP低云的预测提供参考。

关键词(KeyWords)： 青藏高原;副热带东北太平洋;低云;感热;大气环流

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金青年项目（41905006）;; 第二次青藏高原综合科学考察研究项目（2019QZKK0105）;; 广东省教育厅创新团队项目（2023KCXTD015）;; 广东海洋大学科研启动经费资助项目（R19018）;; 国家自然科学基金（72293604）

作者(Author): 何维帅,龙景超,朱陵晶,庄淑淇,徐海,张树钦,薛宇峰,徐建军

参考文献(References)：

• [1] WOOD R. Stratocumulus clouds[J]. Monthly Weather Review, 2012, 140(8):2373-2423.
• [2] SLINGO A. Sensitivity of the Earth’s radiation budget to changes in low clouds[J]. Nature, 1990, 343:49-51.
• [3] KLEIN S A, HARTMANN D L. The seasonal cycle of low stratiform clouds[J]. Journal of Climate, 1993, 6(8):1587-1606.
• [4] IACOBELLIS S F, CAYAN D R. The variability of California summertime marine stratus:Impacts on surface air temperatures[J]. Journal of Geophysical Research:Atmospheres, 2013,118(16):9105-9122.
• [5] YANG L, XIE S P, SHEN S S P, et al. Low cloud-SST feedback over the subtropical northeast Pacific and the remote effect on ENSO variability[J]. Journal of Climate, 2023, 36(2):441-452.
• [6] MIYAMOTO A, NAKAMURA H, XIE S P, et al. Radiative impacts of Californian marine low clouds on North Pacific climate in a global climate model[J]. Journal of Climate,2023, 36(24):8443-8459.
• [7] NORRIS J R. Low cloud type over the ocean from surface observations. part I:relationship to surface meteorology and the vertical distribution of temperature and moisture[J].Journal of Climate, 1998, 11(3):369-382.
• [8] NORRIS J R. Low cloud type over the ocean from surface observations. part II:geographical and seasonal variations[J]. Journal of Climate, 1998, 11(3):383-403.
• [9] WYANT M C, BRETHERTON C S, RAND H A, et al.Numerical simulations and a conceptual model of the stratocumulus to trade cumulus transition[J]. Journal of the Atmospheric Sciences, 1997, 54(1):168-192.
• [10] MAUGER G S, NORRIS J R. Assessing the impact of meteorological history on subtropical cloud fraction[J].Journal of Climate, 2010, 23(11):2926-2940.
• [11] NORRIS J R, LEOVY C B. Interannual variability in stratiform cloudiness and sea surface temperature[J]. Journal of Climate, 1994, 7(12):1915-1925.
• [12] AMAYA D J, MILLER A J, XIE S P, et al. Physical drivers of the summer 2019 North Pacific marine heatwave[J].Nature Communications, 2020, 11:1903.
• [13] EITZEN Z A, XU K M, WONG T. An estimate of low-cloud feedbacks from variations of cloud radiative and physical properties with sea surface temperature on interannual time scales[J]. Journal of Climate, 2011, 24(4):1106-1121.
• [14] HUANG A, LI H, SRIVER R L, et al. Regional variations in the ocean response to tropical cyclones:Ocean mixing versus low cloud suppression[J]. Geophysical Research Letters, 2017, 44(4):1947-1955.
• [15] LONG J C, WANG Y Q, ZHANG S P, et al. Transition of low clouds in the East China Sea and kuroshio region in winter:a regional atmospheric model study[J]. Journal of Geophysical Research:Atmospheres, 2020, 125(17):e2020jd032509.
• [16] CHEN Y J, HWANG Y T, ZELINKA M D, et al. Distinct patterns of cloud changes associated with decadal variability and their contribution to observed cloud cover trends[J].Journal of Climate, 2019, 32(21):7281-7301.
• [17] PARK S, LEOVY C B. Marine low-cloud anomalies associated with ENSO[J]. Journal of Climate, 2004, 17(17):3448-3469.
• [18] FURTADO J C, DI LORENZO E, ANDERSON B T, et al.Linkages between the North Pacific Oscillation and central tropical Pacific SSTs at low frequencies[J]. Climate Dynamics, 2012, 39(12):2833-2846.
• [19] LIU Y M, BAO Q, DUAN A M, et al. Recent progress in the impact of the Tibetan Plateau on climate in China[J].Advances in Atmospheric Sciences, 2007, 24(6):1060-1076.
• [20] DUAN A M, LI F, WANG M R, et al. Persistent weakening trend in the spring sensible heat source over the Tibetan Plateau and its impact on the Asian summer monsoon[J].Journal of Climate, 2011, 24(21):5671-5682.
• [21] WANG B, BAO Q, HOSKINS B, et al. Tibetan Plateau warming and precipitation changes in East Asia[J].Geophysical Research Letters, 2008, 35(14):L14702.
• [22] SUN R Z, DUAN A M, CHEN L L, et al. Interannual variability of the North Pacific mixed layer associated with the spring Tibetan Plateau thermal forcing[J]. Journal of Climate, 2019, 32(11):3109-3130.
• [23] LI W H, LI L F, TING M F, et al. Intensification of Northern Hemisphere subtropical highs in a warming climate[J].Nature Geoscience, 2012, 5:830-834.
• [24] LEONARDO N, HAMEED S. Impact of the Hawaiian high on interannual variations of winter precipitation over California[J]. Journal of Climate, 2015, 28(14):5667-5682.
• [25] Lorenz E N. Empirical Orthogonal Functions and Statistical Weather Prediction[J]. Scientific Reports, 1956.
• [26] BRETHERTON C S, SMITH C, WALLACE J M. An intercomparison of methods for finding coupled patterns in climate data[J]. Journal of Climate, 1992, 5(6):541-560.
• [27] RAMSEY P H, WILKS D S. Statistical methods in the atmospheric sciences[J]. Technometrics, 1996, 38(4):402.
• [28] WOOD R, BRETHERTON C S. On the relationship between stratiform low cloud cover and lower-tropospheric stability[J]. Journal of Climate, 2006, 19(24):6425-6432.
• [29] LONG J C, ZHANG S P, CHEN Y, et al. Impact of the Pacific-Japan teleconnection pattern on July Sea fog over the northwestern Pacific:Interannual variations and global warming effect[J]. Advances in Atmospheric Sciences,2016, 33(4):511-521.
• [30] BRETHERTON C S, WYANT M C. Moisture transport,lower-tropospheric stability, and decoupling of cloudtopped boundary layers[J]. Journal of the Atmospheric Sciences, 1997, 54(1):148-167.
• [31] NORRIS J R, ZHANG Y, WALLACE J M. Role of low clouds in summertime atmosphere-ocean interactions over the North Pacific[J]. Journal of Climate, 1998, 11(10):2482-2490.
• [32] JONES C R, BRETHERTON C S, LEON D. Coupled vs.decoupled boundary layers in VOCALS-REx[J]. Atmospheric Chemistry and Physics, 2011, 11(14):7143-7153.
• [33] FAN W W, HU Z Y, MA W Q, et al. Dominant modes of Tibetan Plateau summer surface sensible heating and associated atmospheric circulation anomalies[J]. Remote Sensing,2022, 14(4):956.
• [34]金蕊,祁莉,何金海.春季青藏高原感热通量对不同海区海温强迫的响应及其对我国东部降水的影响[J].海洋学报, 2016, 38(5):83-95.
• [35] SCHMEISSER L, HINKELMAN L M, ACKERMAN T P.Evaluation of radiation and clouds from five reanalysis products in the northeast Pacific Ocean[J]. Journal of Geophysical Research:Atmospheres, 2018, 123(14):7238-7253.
• [36] KOSHIRO T, SHIOTANI M. Relationship between low stratiform cloud amount and estimated inversion strength in the lower troposphere over the global ocean in terms of cloud types[J]. Journal of the Meteorological Society of Japan Ser II, 2014, 92(1):107-120.
• [37] WANG L, WANG Y Q, LAUER A, et al. Simulation of seasonal variation of marine boundary layer clouds over the Eastern Pacific with a regional climate model[J]. Journal of Climate, 2011, 24(13):3190-3210.
• [38] CHENG A N, XU K M. Evaluating low-cloud simulation from an upgraded multiscale modeling framework model.part III:tropical and subtropical cloud transitions over the northern Pacific[J]. Journal of Climate, 2013, 26(16):5761-5781.
• [39] LIAN Y, SHEN B Z, LI S F, et al. Mechanisms for the formation of Northeast China cold vortex and its activities and impacts:an overview[J]. Journal of Meteorological Research, 2016, 30(6):881-896.
• [40] LI X Z, LIU X D. Numerical simulation of Tibetan Plateau heating anomaly influence on westerly jet in spring[J]. Journal of Earth System Science, 2015, 124(8):1599-1607.