Yes,If you have already set the "grid" keyword in your request, you can add the "area" : "coordinates" keyword

• Yes
• If you have already set the "grid" keyword in your request, you can add the "area" : "coordinates" keyword. You can set pre-defined area regions e.g. europe or set the area using coordinates North/West/South/East.
• You may also wish to visit the MARS area keyword for more information: Post-processing keywords.
• See examples below.

 "area": "europe",

#area:  N/W/S/E

#europe
"area": "75/-20/10/60",

#africa
"area": "40/-20/-40/60",