Indian Ocean

Model 1 Forcing Analysis


Precipitation and Black Carbon

     
     
Precipitation and black carbon mean for forcing run. Precipitation is shaded and is in units of mm/day.  BC is contour lines and is in units of kg/m2. BC is divided by 1000. Precipitation mean seasonal cycle in units of mm/day.  Forcing run. Black carbon mean seasonal cycle in units of g/m2.  Forcing run.
     
     
Precipitation and black carbon variance for forcing run.  Precipitation is shaded and is in units of mm2/day2.   BC is contour lines in units of 20kg2/m4.  BC is divided by 20000. Precipitation variance seasonal cycle in units of mm2/day2.  Forcing run. Black carbon variance seasonal cycle in units of g2/m4.  Forcing run.
     
     
Precipitation and black carbon variance with seasonal cycle removed.  Precipitation is shaded and is in units of mm2/day2.   BC is contour lines in units of 20kg2/m4.  BC is divided by 20000. Precipitation variance seasonal cycle with seasonal cycle removed in units of mm2/day2.  Forcing run. Black carbon variance seasonal cycle with seasonal cycle removed in units of g2/m4.  Forcing run.
     
     
  Black carbon and precipitation mean with seasonal cycle removed.  Top and bottom black carbon tercels are displayed.  
 

Difference Composite - Anomaly

     
     
Precipitation difference composite between BC top tercel and bottom tercel.  Precipitation is shaded in units of mm/day.  Black carbon is in lined contours in units of g/m2. Precipitation difference composite mean seasonal cycle in units of mm/day.  Forcing run. Black carbon difference composite mean seasonal cycle in units of g/m2.  Forcing run
     
     
   
Black carbon difference composite between top tercel and bottom tercel in units of g/m2.    
     
     
September, October, November precipitation anomaly difference composite. December, January, February precipitation anomaly difference composite. March, April, May precipitation anomaly difference composite.
     
     
September, October, November black carbon anomaly difference composite. December, January, February black carbon anomaly difference composite. March, April, May black carbon anomaly difference composite.
     
     
   
June, July, August precipitation anomaly difference composite.    
     
     
   
June, July, August black carbon anomaly difference composite.    

Rain Change

 
Rain change due to black carbon. 

where c is the correlation coefficient of the normalized anomaly (grid rain vs. domain mean bc), σrain is the grid point standard deviation of rain, σbc is the grid point standard deviation of bc, and bcmean is the grid point mean of bc.  Units are in mm/day.

Percent rain change due to black carbon.

where δrain is previously calculated for each grid point (see left) and rain is mean rain at the grid point.

 
     

Difference Composite - Normalized Anomaly

     
     
   
Difference composite for normalized precipitation and black carbon anomaly.    
     

Correlation

     
Normalized anomaly correlation (solid) and significance (contour). Normalized precipitation and black carbon anomalies mean.