1. Progross towards DCC Demo Product-CMA
Presented by Lin Chen
National Satellite Meteorological Center(NSMC), CMA
Acknowledgements: Sebastien Wagner,
Na Xu

2. Outline Progross towards DCC Demo Product-CMA
DCC Seasonal Cycle Analysis
Seasonal Cycle of MODIS DCC
Seasonal Cycle Model
Apply the model to MODIS DCC analysis

3. Part1:Progress towards DCC Demo Product-CMA
CMA has completed the GSICS-DCC operational software for FY2D/E/F/G based on the NASA DCC ATBD.The reference instrument is AQUA/MODIS B1.
The software has the function of automatic abstract, counting and plotting results.
It is ready to produce the DCC demo product when the product format is decided.
Question:
Due to the big bias of FY2 operational IR calibration, the FY2 DCC product should be produced after the IR correction.

4. bias of FY2 operational IR calibration
Provided by Xu Na

5. Main Interfase

6. Working Process Monitor
Working Statue Monitor
CPU usage percentage;
Storage usage percentage;

9. Part2: DCC Seasonal Cycle Analysis
Using the Gussan filter to remove the high frequency signal of DCC and make it smoother.
Using the Aqua/MODIS time period(2004~2009) to build the seasonal cycle model
The standard deviation for different year of the same day as the error bar.

10. Seasonal Cycle of MODIS DCC

11. Seasonal Model For Globally Data

12. Seasonal Model For MSG Area

13. Comparison with MSG DCC model
Provided by Sebastien

14. Apply the model to MODIS DCC analysis
GLOBAL
MSG

15. Conclusions
CMA is ready to produce the DCC demo product when the product format is decided.
DCC seasonal cycle is built based on 6-years MODIS/AQUA B1 data. The model oscillation amplitude is about 0.5% for globally data and 1% for MSG area data both with high point in summer-time and low point in winter-time. when the model is applied to MODIS DCC analysis, it could reduce the STD 20%~30%.

16. Thanks for your attention!