کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4450363 1311697 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of Marcus convergence zone on western North Pacific summer monsoon
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علم هواشناسی
پیش نمایش صفحه اول مقاله
Influence of Marcus convergence zone on western North Pacific summer monsoon
چکیده انگلیسی

This study investigates the atmospheric conditions in the mid-North Pacific Ocean prior to the western North Pacific summer monsoon (WNPSM) onset by focusing on 3 years (2007, 2009, and 2010) with the CloudSat Cloud Profiling Radar (CPR) observation. Two pentads prior to the onset, the mid-latitude upper-tropospheric high potential vorticity (PV) expanded southwestward and intruded into the mid-troposphere of the region around Marcus Island (Marcus region, 20–30°N, 150–170°E). Due to the intrusion of PV, the convection developed over the Marcus region, and the Marcus convergence zone (MCZ) formed. One pentad later, the WNPSM onset occurred when the mid-tropospheric high-PV center and the convection arrived at the subtropical western North Pacific (SWNP, 15–25°N, 130–150°E). It is found that the high-PV expansion is in association with the deepening of the mid-oceanic trough, which signifies the upper-level forcing on the monsoon. It is also found that the cloud water content increased significantly since two pentads prior to the monsoon onset over the mid-North Pacific Ocean. The MCZ-induced moisture advection might provide favorable large-scale atmospheric conditions for changing monsoon-phase.

Research highlights
► We investigate western North Pacific summer monsoon onset using CloudSat observation.
► The Marcus convergence zone (MCZ) could be an antecedent of the monsoon onset.
► The MCZ-induced moisture advection might favor the change of the monsoon phase.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Atmospheric Research - Volume 101, Issue 4, September 2011, Pages 863–868
نویسندگان
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