An air mass with high potential vorticity preceding the formation of the Marcus Convergence Zone

2005 ◽  
Vol 32 (17) ◽  
Author(s):  
N. Sato ◽  
K. Sakamoto ◽  
M. Takahashi
Keyword(s):  
Potential Vorticity ◽  
High Potential ◽  
Convergence Zone ◽  
Air Mass ◽  
High Potential Vorticity

Interannual variability of high potential vorticity in South Atlantic

2011 ◽  
Vol 12 (4) ◽  
pp. 368-374 ◽  
Author(s):  
T. F. Barbosa ◽  
V. B. Rao ◽  
I. F. A. Cavalcanti
Keyword(s):  
Interannual Variability ◽  
Potential Vorticity ◽  
South Atlantic ◽  
High Potential ◽  
High Potential Vorticity

Application of GSMaP for the analysis of upper tropospheric radiative cooling over the Asian summer monsoon region

2021 ◽  
Author(s):  
Toru Terao ◽  
Fumie Murata ◽  
Yusuke Yamane ◽  
Masashi Kiguchi ◽  
Azusa Fukushima ◽  
...  
Keyword(s):  
Summer Monsoon ◽  
Asian Summer Monsoon ◽  
Potential Temperature ◽  
High Potential ◽  
Monsoon Circulation ◽  
Monsoon Region ◽  
Air Mass ◽  
Monsoon System ◽  
Asian Summer ◽  
Summer Monsoon Region

<p>The Asian summer monsoon system is the strongest monsoon circulation on the Earth. A huge reversal of meridional temperature gradient develops over the area covering the hemispheric region due to strong diabatic heating associated with convective activities. Vigorous conventions reach the upper troposphere providing a great amount of high potential temperature airmass. This high potential temperature air mass originates from the high equivalent potential temperature airmass accumulated in the lower troposphere over the Asian monsoon region. The highest potential temperature tropospheric air mass is observed only over the Asian summer monsoon region. To get a total view of the Asian summer monsoon circulation system, we focused on the mass budget of the upper-tropospheric air mass with a potential temperature between 355K to 370K. The non-conservative change of the air mass corresponds with the diabatic heating due to the convective activities, and the diabatic cooling due to the radiative process. To analyze the radiative cooling process that takes place in the upper troposphere, we utilized hourly GSMaP pixel values to detect rain-free pixels of the ERA5 dataset. We calculated the non-conservative air mass tendency over the rain-free pixels on a daily and 0.5 degrees spatio-temporal scale. We found the radiative equilibrium amount of high potential temperature air mass and the Newtonian cooling process with a relaxation time scale of 6 to 7 days. We will show the quantitative estimates of the total convective process of the Asian summer monsoon system associated with the convective clouds and radiative processes, through the mass budget of 355K-370K potential temperature air mass. We will further show results of the evaluation of the accuracy of TRMM and GPM products using our high-resolution tipping bucket raingauge network distributed over the Northeastern Indian subcontinent.</p>

Springtime Fire Weather in Tasmania, Australia: Two Case Studies

2012 ◽  
Vol 27 (2) ◽  
pp. 379-395 ◽  
Author(s):  
Paul Fox-Hughes
Keyword(s):  
Wind Speed ◽  
Case Studies ◽  
Potential Vorticity ◽  
Good Evidence ◽  
Fire Weather ◽  
Cold Fronts ◽  
Additional Peak ◽  
Weather Events ◽  
Strong Winds ◽  
High Potential Vorticity

Abstract A number of severe springtime fire weather events have occurred in Tasmania, Australia, in recent years. Two such events are examined here in some detail, in an attempt to understand the mechanisms involved in the events. Both events exhibit strong winds and very low surface dewpoint temperatures. Associated 850-hPa wind–dewpoint depression conditions are extreme in both cases, and evaluation of these quantities against a scale of past occurrences may provide a useful early indicator of future severe events. Both events also feature the advection of air from drought-affected continental Australia ahead of cold fronts. This air reaches the surface in the lee of Tasmanian topography by the action of the föehn effect. In one event, there is good evidence of an intrusion of stratospheric, high potential vorticity (PV), air, supplementing the above mechanism and causing an additional peak in airmass dryness and wind speed.

Best practices to develop high-potential talent

2009 ◽  
Author(s):  
Steve Krupp ◽  
Orla M. NicDomhnaill ◽  
Allan H. Church ◽  
Steven J. Robison ◽  
Michael N. Bazigos
Keyword(s):  
Best Practices ◽  
High Potential

Current issues in identifying and growing high-potential talent

2009 ◽  
Author(s):  
Michel A. Buffet ◽  
Robin R. Cohen ◽  
Michael Crespo ◽  
Stephen A. Dwight ◽  
Lorry A. Olson
Keyword(s):  
High Potential
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