DocumentCode :
2218595
Title :
A Numerical Study on the Anomalies of the South Asian High and the Subtropical Western Pacific High
Author :
Zhang, Ling ; Zhi, Xiefei
Author_Institution :
Key Lab. of Meteorol. Disaster of Minist. of Educ., Nanjing Univ. of Inf. Sci. & Technol., Nanjing, China
fYear :
2009
fDate :
26-28 Dec. 2009
Firstpage :
4671
Lastpage :
4674
Abstract :
A numerical study on the relationship between the interannual longitudinal oscillation of the South Asian High (SAH) and the subtropical western Pacific high (SWPH) and the heat source anomalies during boreal summer has been conducted by using a high-resolution regional climate model IPRC-RegCM. The results show that the anomalous heating (cooling) over the Yellow River and Huaihe River valley may play an important role in the longitudinal oscillation of the SAH and the SWPH in summer. Further study suggests that the heat source (sink) strengthens (weakens) the ascending motion of the air over the Yellow River and Huaihe River valley, which reinforces (reduces) the high-level divergence. Consequently, the intensity of the SAH increases (decreases) and the ridge of the SAH extends further eastward (withdraws westward). In addition, due to the anomalous northerly in upper (middle) troposphere the abnormal sinking (rising) motion of the air occurs above the sea in middle and low latitudes, which is accompanied by adiabatic heating (cooling). As a result, the deep and warm SWPH is strengthened (weakened) and extends further westward (withdraws eastward).
Keywords :
atmospheric boundary layer; atmospheric movements; atmospheric temperature; climatology; oceanographic regions; rivers; Huaihe River valley; IPRC-RegCM; SAH; SWPH; South Asian High; Yellow River; abnormal sinking motion; adiabatic heating; anomalous heating; boreal summer; heat source anomalies; high-resolution regional climate model; interannual longitudinal oscillation; longitudinal oscillation; subtropical western Pacific high; upper troposphere; Asia; Clouds; Cooling; Educational technology; Heat sinks; Heating; Information science; Laboratories; Meteorology; Rivers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Science and Engineering (ICISE), 2009 1st International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4909-5
Type :
conf
DOI :
10.1109/ICISE.2009.128
Filename :
5454966
Link To Document :
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