xinyu wen xwen@pku.edu.cn june 2010xwen@pku.edu.cn
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REAL-TIME WEATHER WATCHINGCLIMATE CHANGE RESEARCH GROUP
Please visithttp://www.phy.pku.edu.cn/climate/wiki2/doku.php/services/ 气候组天气站
Xinyu Wen xwen@pku.edu.cn June 2010
Design Philosophy
Usefulnot only for teachers and researchers, but also for students and amateurs by showing clear and easy-to-understand plots
Simpledevelop as simple scripts as possible for downloading and plotting, also for maintaining
Robustimprove the availability of the scripts, make it robust under a variety of emergencies, such as NOMADS problem/Internet access problem/PKU Campus Network problem, etc.
Features
Automatically downloadreal-time data, FNL, provided by NOAA NOMADS3(getXXz.csh)
Automatically mark failed data/timestampin case Internet access was down(missinglist)
Automatically re-try those failed data/timestamp every noontime(manual.csh)
Automatically update webpages(getXXz.csh and manual.csh)
只要 ClimateServer 和物理学院的 PhyServer 开着就行,不论 Internet是否可用,不论 NOMADS3 是否及时更新,不论学校网络是否有任何维护。 Missinglist 的机制使得本系统的容错能力大大加强!
Cycle Schematic
CrontabJob
Schedualer
9:002:00 BJ-18:00 GMTOBS
Lag = 7 hr 12:00
Re-try missed
data recorded
in “missingl
ist”Manual.c
sh
15:10
8:00 BJ00:00 GMTOBS
Lag = 7 hr 10min
20:50
14:00 BJ8:00 GMTOBS
Lag = 6 hr 50min
5:10-20:00 BJ
-12:00 GMTOBS
Lag = 9 hr 10 min
每天更新 4 次查缺补漏 1 次
Domain
DATA:FNL global data assimilation system, 6-hourly, 1deg x 1deg grid, 26 pressure levels (1000, 975, 950, 925, 900, 850, 800, 750, 700, 650, 600, 550, 500, 450, 400, 350, 300, 250, 200, 150, 100, 70, 50, 30, 20, 10 mb), GRIB2 format
Released by NOMADS3/NCEP/NOAA:http://nomad3.ncep.noaa.gov/pub/gdas/rotating/
In NCL:
res@mpProjection = “LambertConformal”res@mpLambertParallel1F = 30res@mpLambertParallel2F = 60res@mpLambertMeridianF = 110
res@mpLimitMode = “Corners”res@mpLeftCornerLatF = 42res@mpLeftCornerLonF = 37res@mpRightCornerLatF = 3res@mpRightCornerLonF = 142
This is what 1x1 grid
looks lik
e
Demo地面图显示:
1. 地表 2 米温度2. 订正至海平面的气压3. 地表 10 米风场
Demo高空 850 百帕图显示:
1. 大气柱总可降水量2. 850mb 风场
Demo高空 700 百帕图显示:
1. 对流潜能 CAPE2. 700mb 高度场3. 700mb 风场
Demo高空 500 百帕图显示:
1. 绝对涡度2. 500mb 高度场3. 500mb 风场
Demo 两极 500 百帕图显示: 500mb 高度场。这是为了更好地显示 500mb 长波特征。
Future Work
Use other dataset?NCEP 1; NCEP 2; GFS;
Provide future forecasts?GFS(0.5x0.5) 7-day forecasts;
More plots?cross-sections at Beijing; cross-sections at meridians; Stratosphere; 200mb;
Improve lag time?current is ~9 hours, any room to improve?
欢迎有兴趣的学生加入!联系我们 xwen@pku.edu.cn
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