海南岛地形对局地海风环流结构影响的数值模拟

杨秋彦; 苗峻峰; 王语卉

海南岛地形对局地海风环流结构影响的数值模拟

1.
南京信息工程大学气象灾害教育部重点实验室, 江苏南京 210044
2.
南京信息工程大学气象灾害教育部重点实验室, 江苏南京 210044;浙江省气象台, 浙江杭州 310016

基金项目: 公益性行业（气象）科研专项经费项目（GYHY201306009）。

计量
- 文章访问数: 997
- HTML全文浏览量: 9
- PDF下载量: 667
- 被引次数: 0
出版历程
- 收稿日期: 2016-05-22

A numerical study of impact of topography on sea breeze circulation over the Hainan Island

1.
Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China
2.
Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China;Zhejiang Meteorological Observatory, Hangzhou 310016, China

摘要

摘要: 本文利用WRF模式对2014年5月25日发生在海南的一次海风过程进行了数值模拟，通过地形敏感性试验，探讨了海南岛地形对局地海风环流结构的影响。结果表明：控制试验（CNTL）海风于15时左右达到强盛。无地形试验（FLAT）中，水平方向上，海风持续时间缩短，南、北、西向海风向内陆传播距离变短1~5 km，海风强度减弱1 m/s左右，海风动能及辐合强度在沿海地区及西南山区存在大值衰减区；垂直方向上，海风碰撞位置向西、北方向移动，高空回流高度降低，海风厚度减小，垂直环流强度减弱2~6 m²/s²，海风锋附近的垂直速度减小10 cm/s以上。谷风对海风同相叠加作用的消失也使得海风强度减弱。其主要影响机制为：在动力方面，由山脉屏障作用引起的海风强迫抬升、绕流等增强作用消失；在热力方面，地表吸收净辐射减少，导致其向大气中释放的感热、潜热通量等各项均减少约9%，这种改变造成了海陆之间温度、气压差的减小，最终造成了海风的减弱。此外，通过两组削山试验，发现海拔高度降低区辐合范围、强度及动能均减小，同时海风垂直环流结构也相应发生改变，其中移去黎母山脉（RMLM）对海风环流结构的影响大于移去五指山脉（RMWZ）。
- 热带岛屿 /
- 复杂地形 /
- 海风结构 /
- 海风辐合
Abstract: One sea breeze circulation process over the Hainan Island is simulated by the WRF model on 25 May, 2014. The impact of topography on the sea breeze circulation is studied by changing the terrain height. The results show that the land-sea thermal difference, which is the trigger mechanism of sea breeze, reaches its top at 15:00 LST in CNTL experiment. In FLAT experiment, the main variations are embodied in two aspects, one is in the horizontal direction:the duration of the sea breeze becomes shorter, and the propagation distance of sea breeze reduces about 1~5 km. At the same time, the intensity of sea breeze weakens more than 1 m/s. Meanwhile, the kinetic energy of sea breeze exists great attenuation area in the coastal and southwest region, and the corresponding range of sea breeze convergence zone narrows down and the sea breeze convergence line also moves to the coastal regions. The other is in the vertical direction:the impacted location of different directions of sea breeze moves to the west and north, the backflow in high altitude and sea breeze thickness become lower. The intensity of the vertical circulation around sea breeze front reduces more than 10 cm/s. Moreover, the effect which the valley wind strengthens the sea breeze disappears. Its Influence mechanism can be summarized as the following two parts:in the dynamical aspect, the updraft and flow caused by mountains disappeared. In the thermal aspect, net radiation absorbed by the earth's surface decreases, which causes the releasing of sensible heat flux and latent heat flux decline about 9%, respectively. Ultimately, land-sea thermal difference and the corresponding air pressure difference all get smaller than CNTL, which weakens the basic characteristics of the sea breeze circulation. In addition, the results of the two experiments which only part of the mountains is removed show that the kinetic energy and convergence zone of sea breeze become weaker in the corresponding regions, and the structure of the vertical circulation also changes, the influence of Limu Mountain (RMLM) on sea breeze is greater than Wuzhi Mountain (RMWZ).
- tropical island /
- complex topography /
- sea breeze structure /
- sea breeze convergence

HTML全文

参考文献(34)

Lin W S, Wang A Y, Wu C S, et al. A case modeling of sea-land breeze in Macao and its neighborhood[J]. Advances in Atmospheric Sciences, 2001, 18(6):1231-1240.

Miller S T K, Keim B D, Talbot R W, et al. Sea breeze:Structure, forecasting, and impacts[J]. Reviews of Geophysics, 2003, 41(3):181-207.

Miao J F, Kroon L J M, Arellano V G D, et al. Impacts of topography and land degradation on the sea breeze over eastern Spain[J]. Meteorology and Atmospheric Physics, 2003, 84(3-4):157-170.

Miao J F, Wyser K, Chen D, et al. Impacts of boundary layer turbulence and land surface process parameterizations on simulated sea breeze characteristics[J]. Annales Geophysicae, 2009, 27(6):2303-2320.

苗峻峰. 城市热岛和海风环流相互作用的数值模拟研究进展[J]. 大气科学学报, 2014, 37(4):521-528. Miao Junfeng. An overview of numerical studies of interaction of urban heat island and sea breeze circulations[J]. Transactions of Atmospheric Sciences, 2014, 37(4):521-528.

吴增茂. 渤海南岸海陆风个例分析及判别[J]. 海洋与湖沼, 1989, 20(1):87-91. Wu Zengmao. Case analysis and discrimination of sea/land breeze at the sourthern shore of Bohai Sea[J]. Oceanologia et Limnologia Sinica, 1989, 20(1):87-91.

Wu Z M. Numerical analysis of three-dimensional structure of the sea breeze over southwestern Bohai Gulf[J]. Acta Meteorologica Sinica, 1988, 2(2):175-186.

盛春岩, 史茜, 高守亭, 等. 一次冷锋过境后的海风三维结构数值模拟[J]. 应用气象学报, 2010, 21(2):189-197. Sheng Chunyan, Shi Qian, Gao Shouting, et al. Numerical simulation of a sea breeze event after the passage of a cold front[J]. Journal of Applied Meteorological Science, 2010, 21(2):189-197.

高山红, 吴增茂. 海岛测站大风资料代表性的数值模型分析[J]. 应用气象学报, 1999, 10(3):333-338. Gao Shanhong, Wu Zengmao. Numerical simulation on the representativeness of island wind observations[J]. Journal of Applied Meteorological Science, 1999, 10(3):333-338.

高山红, 张新玲, 吴增茂. 渤海海面风场的一种动力诊断方法[J]. 海洋学报, 2001, 23(6):51-58. Gao Shanhong, Zhang Xinling, Wu Zengmao. A dynamical diagnosis method on obtaining surface wind field over the Bohai Sea[J]. Haiyang Xuebao, 2001, 23(6):51-58.

Fovell R G. Convective initiation ahead of the sea-breeze front[J]. Monthly Weather Review, 2005, 133(1):264-278.

苏涛, 苗峻峰, 韩芙蓉. 海风雷暴的观测分析和数值模拟研究进展[J]. 气象科技, 2016, 44(1):47-54. Su Tao, Miao Junfeng, Han Furong. An overview of observational and numerical studies of sea breeze thunderstorms[J]. Meteorological Science and Technology, 2016, 44(1):47-54.

Monserrat S, Ramis C. Dynamic stability of a three layer model with discontinous profile of wind and temperature[J]. Journal of the Atmospheric Sciences, 1990, 47(17):2108-2114.

Crosman E T, Horel J D. Sea and lake breezes:A review of numerical studies[J]. Boundary-Layer Meteorology, 2010, 137(1):1-29.

李庆宝, 苗世光, 刘学刚, 等. 边界层流场和地形特征对青岛奥帆赛场午后海风影响的研究[J]. 气象学报, 2010, 68(6):985-997. Li Qingbao, Miao Shiguang, Liu Xuegang, et al. On the impacts of boundary-layer flows and the terrain on the afternoon sea-breeze in the Qingdao Olympic sailing venue[J]. Acta Meteorologica Sinica, 2010, 68(6):985-997.

Barthlott C, Kirshbaum D J. Sensitivity of deep convection to terrain forcing over Mediterranean Islands[J]. Quarterly Journal of the Royal Meteorological Society, 2013, 139(676):1762-1779.

Qian T, Epifanio C C, Zhang F. Topographic effects on the tropical land and sea breeze[J]. Journal of the Atmospheric Sciences, 2012, 69(1):130-149.

Jeong J H, Song S K, Lee H W, et al. Effects of high-resolution land cover and topography on local circulations in two different coastal regions of Korea:A numerical modeling study[J]. Meteorology and Atmospheric Physics, 2012, 118(1-2):1-20.

Abatan A A, Abiodun B J, Omotosho B J. On the characteristics of sea breezes over Nigerian coastal region[J]. Theoretical and Applied Climatology, 2014, 116(1-2):93-102.

陈训来, 王安宇, 李江南, 等. 香港地区海陆风的显式模拟研究[J]. 气象科学, 2007, 27(5):473-480. Chen Xunlai, Wang Anyu, Li Jiangnan, et al. Numerical experiment research on sea and land breezes over Hong Kong[J]. Scientia Meteorologica Sinica, 2007, 27(5):473-480.

柯史钊, 黄健. 华南海陆风的数值模拟[J]. 热带气象学报, 1993, 9(2):169-176. Ke Shizhao, Huang Jian. A numerical simulation of land and sea breezes in South China[J]. Journal of Tropical Meteorology, 1993, 9(2):169-176.

Tu Xiaoling, Zhou Mingyu, Sheng Shaohua. The mesoscale numerical simulation of the flow field of the Hainan Island and the Leizhou Peninsula[J]. Acta Oceanologica Sinica, 1993, 12(2):219-235.

吴兑, 陈位超, 游积平, 等. 海口西郊海岸地带低层大气结构研究[J]. 热带气象学报, 1995, 11(2):123-132. Wu Dui, Chen Weichao, You Jiping, et al. A study on low-layer atmospheric structure on the seaside borders to the west of Haikou[J]. Journal of Tropical Meteorology, 1995, 11(2):123-132.

王静, 苗峻峰, 冯文. 海南岛海风演变特征的观测分析[J]. 气象科学, 2016, 36(2):244-255. Wang Jing, Miao Junfeng, Feng Wen. An observational analysis of sea breeze characteristics over the Hainan Island[J]. Scientia Meteorologica Sinica, 2016, 36(2):244-255.

翟武全,李国杰,孙斌, 等.海南岛附近四季风场的中尺度环流[J].热带气象学报,1997,13(4):315-322. Zhai Wuquan, Li Guojie, Sun Bin, et al. Season's wind fields of mesoscale circulation in Hainan Island[J]. Journal of Tropical Meteorology, 1997, 13(4):315-322.

张振州, 蔡旭晖, 宋宇, 等. 海南岛地区海陆风的统计分析和数值模拟研究[J]. 热带气象学报, 2014, 30(2):270-280. Zhang Zhenzhou, Cai Xuhui, Song Yu, et al. Statistical characteristics and numerical simulation of sea land breezes in Hainan Island[J]. Journal of Tropical Meteorology, 2014, 30(2):270-280.

钱维宏. 海南岛地形及热源对气流影响的数值模拟试验[J]. 海洋预报, 1988, 5(1):14-22. Qian Weihong. A numerical simulation of the effects of the topography and heat sources of Hainan Island on the flows over the surrounding waters[J]. Marine Forecasts, 1988, 5(1):14-22.

王语卉, 苗峻峰, 蔡亲波. 海南岛海风三维结构的数值模拟[J]. 热带气象学报, 2016, 32(1):109-124. Wang Yuhui, Miao Junfeng, Cai Qinbo. Numerical simulation on the 3D structure of sea breezes over the Hainan Island[J]. Journal of Tropical Meteorology, 2016, 32(1):109-124.

朱乾根, 周军, 王志明, 等. 华南沿海五月份海陆风温压场特征与降水[J]. 南京气象学院学报, 1983, 6(2):150-158. Zhu Qiangen, Zhou Jun, Wang Zhiming, et al. Features of temperature and pressure fields with respect to sea/land breezes and precipitation along the coast of South China during May[J]. Journal of Nanjing Institute of Meteorology, 1983, 6(2):150-158.

王赐震, 宋西龙. 山东半岛北部沿海的海陆风[J]. 海洋学报, 1988, 10(6):678-686. Wang Cizhen, Song Xilong. Sea-land breeze of coastal area of north of Shandong Peninsula[J]. Haiyang Xuebao, 1988, 10(6):678-686.

Ma S, Zhou L, Zou H, et al. The role of snow/ice cover in the formation of a local Himalayan circulation[J]. Meteorology and Atmospheric Physics, 2013, 120(1-2):45-51.

易笑园, 刘一玮, 孙密娜, 等. 海风辐合线对雷暴系统触发、合并的动热力过程[J]. 气象, 2014, 40(12):1539-1548. Yi Xiaoyuan, Liu Yiwei, Sun Mina, et al. Analysis on dynamical and thermodynamic process of thunderstorms triggered and merged by sea-breeze convergence lines[J]. Meteorological Monthly, 2014, 40(12):1539-1548.

盛春岩. 不同天气尺度系统风下的海风发生发展过程对比分析[J]. 海洋科学, 2011, 35(1):88-97. Sheng Chunyan. Comparative analysis of the development of the sea breezes under different synoptic-scale winds[J]. Marine Sciences, 2011, 35(1):88-97.

宋洁慧, 寿绍文, 刘旭, 等. 宁波一次典型夏季海陆风过程观测分析和数值模拟[J]. 热带气象学报, 2009, 25(3):336-342. Song Jiehui, Shou Shaowen, Liu Xu, et al. Observational studies and numerical simulation of a land and sea breezes case over eastern Ningbo[J]. Journal of Tropical Meteorology, 2009, 25(3):336-342.

施引文献

资源附件(0)

访问统计