katrina0512l 2012-5-31 01:58
1. use google
2. how come you have this conclusion? any evident?
3. use your brain before asking question...you are human...
omegatorque 2012-5-31 03:57
The low-level easterlies that you have described, was not located south of STR (subtropical ridge) .
[img]http://weather.uwyo.edu/upperair/images/2012052812.45004.skewt.gif[/img]
subtropical ridge:
[IMG]http://www.ecmwf.int/products/forecasts/d/getchart/catalog/products/forecasts/medium/deterministic/msl_uv850_z500!Geopotential%20500%20hPa%20and%20Temperature%20at%20850%20hPa!0!Asia!pop!od!oper!public_plots!2012052812!!chart.gif[/IMG]
Littleric 2012-6-10 23:15
樓主打好個氣象底先啦 @@
omegatorque 2012-6-11 05:21
[quote]原帖由 [i]st01w[/i] 於 2012-6-10 05:14 PM 發表 [url=http://www.discuss.com.hk/redirect.php?goto=findpost&pid=331815252&ptid=19206875][img]http://www.discuss.com.hk/images/common/back.gif[/img][/url]
IN THAT CASE,HOW COULD THAT EASTERLIES BE BROUGHT?:funk: [/quote]
Refer to the backward trajectory of the air parcel,
[img]http://www.hko.gov.hk/wxinfo/trajectory/img/trajectory2012052900.png[/img]
On 2011.05.29, the "easterlies", is a part of low level anticyclone.
During the genesis of anticyclones, there should be NVA (negative vorticity advection) at low levels, such as 850 hPa.