Merge PR #263 (Restrict volcano clim prints to root thread)

This merge brings PR #263 (Restrict volcano climatology prints to
root thread, by @lizziel) into the HEMCO "no-diff-to-benchmark"
development stream.

This PR was added for running HEMCO in the GEOS ESM, in order to
reduce the amount of printout to the root thread.

Signed-off-by: Bob Yantosca <[email protected]>

CHANGELOG.md

@@ -9,6 +9,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 - Now allow up to 10 nested brackets (`((( )))`) in the `HEMCO_Config.rc` file
 
+### Fixed
+- Limit volcano climatology file read message to root core
+
 ## [3.8.0] - 2024-02-07
 ### Changed
 - Updated TOMAS_Jeagle sea salt extension

src/Extensions/hcox_volcano_mod.F90

@@ -651,9 +651,11 @@ SUBROUTINE ReadVolcTable( HcoState, ExtState, Inst, RC )
           INQUIRE( FILE=TRIM( ThisFile ), EXIST=FileExists )
 
           ! Write message to stdout and HEMCO log
-          MSG = 'Attempting to read volcano climatology file'
-          WRITE( 6,   300 ) TRIM( MSG )             
-          CALL HCO_MSG( HcoState%Config%Err, MSG )
+          IF ( Hcostate%amIRoot ) THEN
+             MSG = 'Attempting to read volcano climatology file'
+             WRITE( 6,   300 ) TRIM( MSG )             
+             CALL HCO_MSG( HcoState%Config%Err, MSG )
+          ENDIF
 
           ! Create a display string based on whether or not the file is found
           IF ( FileExists ) THEN