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 like

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