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Update nasa_power VARIABLE_MAP with additional parameters #2762

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Update nasa_power VARIABLE_MAP with additional parameters #2762

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764eed1
Update nasa_power VARIABLE_MAP with additional parameters
karlhillx May 25, 2026
d16f5a1
Extend VARIABLE_MAP with remaining NASA POWER parameters, fix dew poi…
karlhillx May 25, 2026
294d8d4
Fix PS unit conversion: kPa to Pa for pvlib.atmosphere compatibility
karlhillx May 25, 2026
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15 changes: 14 additions & 1 deletion pvlib/iotools/nasa_power.py
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,15 @@
'T2M': 'temp_air',
'WS2M': 'wind_speed_2m',
'WS10M': 'wind_speed',
'ALLSKY_SRF_ALB': 'albedo',
'ALLSKY_SFC_LW_DWN': 'longwave_down',
'ALLSKY_TOA_SW_DWN': 'ghi_extra',
'CLRSKY_DIFF': 'dhi_clear',
'PS': 'pressure',
'T2MDEW': 'temp_dew',
'T2MWET': 'temp_dew',
'RH2M': 'relative_humidity',
'SRF_ALB': 'albedo',
'TQV': 'precipitable_water',
}


Expand Down Expand Up @@ -150,5 +158,10 @@ def get_nasa_power(latitude, longitude, start, end,
# Rename according to pvlib convention
if map_variables:
df = df.rename(columns=VARIABLE_MAP)
# NASA POWER returns PS in kPa; pvlib convention is Pa.
# Conversion required for pvlib.atmosphere.pres2alt, alt2pres,
# get_absolute_airmass, and other pressure-dependent functions.
if 'pressure' in df.columns:
df['pressure'] = df['pressure'] * 1000

return df, meta