The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.
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Transcript of The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.
![Page 1: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/1.jpg)
The Simulation and Analysis of Temperature and Precipitation
of CAM on Sahel Drought
Yi-Chih Huang
![Page 2: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/2.jpg)
Sahel Drought (I)
Nicholson et al. 2000
Dai et al. 2004
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Sahel Drought (II)
Todd Mitchell’s web page
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GPCP• Global Precipitation climatology Project • Data
– 2.5 x 2.5 degree grid from Jan 1979 to Sep 2009– 1 x 1 degree grid from Oct 1996 to Jun 2009
• Created by merging – rain gauge data– Infrared estimates of precipitation– microwave satellite estimates of precipitation
• Scattering : Wilheit et al. (1991) histogram approach• Emission : Grody (1991) scattering index
![Page 5: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/5.jpg)
CMAP• The CPC (Climate Prediction Center) Merged
Analysis of Precipitation• Data
– on 2.5 x 2.5 degree grid from 1979 to 2008– pentad and monthly analysis
• Sources– gauge observations– five kinds satellite estimates (IR-based GPI, OLR-
based OPI, MSU, microwave scattering and microwave emission)
– NCEP/NCAR reanalysis
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Hydrological Onset and Withdrawal Index
Dalu, et al., 2009
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Precipitation in August 2000 (I)
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Precipitation in August 2000 (II)
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Precipitation in August 2000 (III)
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African Surface Temperature CAM v CRU
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African Surface Temperature DeparturesCAM v CRU
![Page 12: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/12.jpg)
Histogram of African Surface Temperature Departures for CAM v CRU
![Page 13: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/13.jpg)
African Surface Temperature Departures with Least/Largest RMSE for CAM v CRU
![Page 14: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/14.jpg)
African Surface Temperature CAM v NCEP
![Page 15: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/15.jpg)
African Surface Temperature Departures CAM v NCEP
![Page 16: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/16.jpg)
Histogram of African Surface Temperature Departures for CAM v NCEP
![Page 17: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/17.jpg)
African Surface Temperature Departures with Least/Largest RMSE for CAM v NCEP
![Page 18: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/18.jpg)
Sahelian Surface Temperature Departures CAM v CRU
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Sahelian Surface Temperature Departures with Least/Largest RMSE for CAM v CRU
![Page 20: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/20.jpg)
Sahelian Surface Temperature Departures CAM v NCEP
![Page 21: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/21.jpg)
Sahelian Surface Temperature Departures with Least/Largest RMSE for CAM v NCEP
![Page 22: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/22.jpg)
African Precipitation CAM v CRU
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African Precipitation Departures CAM v CRU
![Page 24: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/24.jpg)
RMS Histograms of African Precipitation Departures for CAM v CRU
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African Precipitation Departures with Least/Largest RMSE for CAM v CRU
![Page 26: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/26.jpg)
African Precipitation CAM v NCEP
![Page 27: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/27.jpg)
African Precipitation Departures CAM v NCEP
![Page 28: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/28.jpg)
RMS Histograms of African Precipitation Departures for CAM v NCEP
![Page 29: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/29.jpg)
African Precipitation Departures with Least/Largest RMSE for CAM v NCEP
![Page 30: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/30.jpg)
Sahelian Precipitation Departures CAM v CRU
![Page 31: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/31.jpg)
Sahelian Precipitation Departures with Least/Largest RMSE for CAM v CRU
![Page 32: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/32.jpg)
Sahelian Precipitation Departures CAM v NCEP
![Page 33: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/33.jpg)
Sahelian Precipitation Departures with Least/Largest RMSE for CAM v NCEP
![Page 34: The Simulation and Analysis of Temperature and Precipitation of CAM on Sahel Drought Yi-Chih Huang.](https://reader035.fdocuments.in/reader035/viewer/2022070408/56649e6b5503460f94b68cb0/html5/thumbnails/34.jpg)
CAM Ensemble Tables6 15 20 23 31 35 40 45
least RMSE largest RMSE
st ΔCAM-ΔCRU 14 22 32 39 43 54 56 62
2 5 6 15 20 28 57 63
st ΔCAM-ΔNCEP 13 14 32 39 43 56 60 62
5 6 15 20 23 28 51 53
pcp ΔCAM-ΔCRU 4 12 13 34 36 37 43 61
2 15 20 23 31 33 35 45
pcp ΔCAM-ΔNCEP 4 34 36 37 41 43 60 61
6 15 20 23 31 35 40 45Sahel least RMSE largest RMSE
st ΔCAM-ΔCRU 9 12 14 22 26 34 41 60
6 15 20 23 31 33 45 58
st ΔCAM-ΔNCEP 9 12 14 22 26 34 41 44
6 15 19 20 23 31 33 45
pcp ΔCAM-ΔCRU 4 19 36 37 38 42 48 61
3 6 7 20 31 33 50 53
pcp ΔCAM-ΔNCEP 4 13 14 19 37 42 43 61
3 6 7 31 33 45 50 53
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Summary• Since late 1960’s precipitation in Sahelian region is
almost persistently below the longterm mean• The patterns of mean CAM ensemble precipitation
in August 2000 are very different from CRU, GPCP, CMAP and NCEP
• CAM is Compared with CRU and NCEP– No ensemble run is in the groups with the least RMSE’s
in both temperature and precipitation– Several runs are in groups with the largest RMSE’s in
both temperature and precipitation in African and Sahelian domains