Up to now, I have processed ERA5 data on pressure layers in my program using such a code:
import cdsapi
dataset = "reanalysis-era5-pressure-levels"
request = {
"product_type": ["reanalysis"],
"variable": [
"temperature"
],
"year": ["2010"],
"month": ["11"],
"day": ["30"],
"time": [
"00:00"
],
"pressure_level": [
"1", "10", "100",
"1000"
],
"data_format": "netcdf",
"download_format": "unarchived"
}
target = "2010.11.30_atmosphere.nc"
client = cdsapi.Client()
client.retrieve(dataset, request, target).download()
Now I want to include data from the lower mesosphere, thus I have to change to ERA5 data on model layers. But when I download data with the following code, I face a problem:
import cdsapi
c = cdsapi.Client()
c.retrieve('reanalysis-era5-complete', {
'date' : '2010-11-30',
'levelist': '1/10/100/137',
'levtype' : 'ml',
'param' : '130',
'stream' : 'oper',
'time' : '00',
'type' : 'an',
'area' : 'global',
'grid' : '1.0/1.0',
'format' : 'netcdf',
}, '2010.11.30_mesosphere.nc')
When I want to open the second file in GrADS, I got the message: “gadsdf: SDF file does not have any non-coordinate variables.” But ncdump tells me that there is data:
netcdf 2010.11.30_mesosphere {
dimensions:
longitude = 360 ;
latitude = 181 ;
level = 4 ;
time = 1 ;
variables:
float longitude(longitude) ;
longitude:units = “degrees_east” ;
longitude:long_name = “longitude” ;
float latitude(latitude) ;
latitude:units = “degrees_north” ;
latitude:long_name = “latitude” ;
int level(level) ;
level:long_name = “model_level_number” ;
int time(time) ;
time:units = “hours since 1900-01-01 00:00:00.0” ;
time:long_name = “time” ;
time:calendar = “gregorian” ;
short t(time, level, latitude, longitude) ;
t:scale_factor = 0.00185918191681576 ;
t:add_offset = 243.645676854354 ;
t:_FillValue = -32767s ;
t:missing_value = -32767s ;
t:units = “K” ;
t:long_name = “Temperature” ;
t:standard_name = “air_temperature” ;// global attributes:
:Conventions = “CF-1.6” ;
:history = “2024-10-24 08:01:11 GMT by grib_to_netcdf-2.36.0: grib_to_netcdf -S param -o data.nc data.grib” ;
data:longitude = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53,
54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71,
72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89,
90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105,
106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133,
134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147,
148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161,
162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189,
190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203,
204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217,
218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231,
232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245,
246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 256, 257, 258, 259,
260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273,
274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287,
288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299, 300, 301,
302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315,
316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329,
330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343,
344, 345, 346, 347, 348, 349, 350, 351, 352, 353, 354, 355, 356, 357,
358, 359 ;latitude = 90, 89, 88, 87, 86, 85, 84, 83, 82, 81, 80, 79, 78, 77, 76, 75,
74, 73, 72, 71, 70, 69, 68, 67, 66, 65, 64, 63, 62, 61, 60, 59, 58, 57,
56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39,
38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21,
20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0,
-1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12, -13, -14, -15, -16,
-17, -18, -19, -20, -21, -22, -23, -24, -25, -26, -27, -28, -29, -30,
-31, -32, -33, -34, -35, -36, -37, -38, -39, -40, -41, -42, -43, -44,
-45, -46, -47, -48, -49, -50, -51, -52, -53, -54, -55, -56, -57, -58,
-59, -60, -61, -62, -63, -64, -65, -66, -67, -68, -69, -70, -71, -72,
-73, -74, -75, -76, -77, -78, -79, -80, -81, -82, -83, -84, -85, -86,
-87, -88, -89, -90 ;level = 1, 10, 100, 137 ;
time = 972240 ;
t =
-15910, -15910, -15910, -15910, -15910, -15910, -15910, -15910, -15910,
-15910, -15910, -15910, -15910, -15910, -15910, -15910, -15910, -15910, …
Can anybody explain me why it does not work?
Thank you in advance!