Supplementary Materials for
Attribution of individual methane and carbon dioxide emission sources using
EMIT observations from space
Andrew K. Thorpe
et al.
Corresponding author: Andrew K. Thorpe, andrew.k.thorpe@jpl.nasa.gov
Sci. Adv.
9
, eadh2391 (2023)
DOI: 10.1126/sciadv.adh2391
This PDF file includes:
Text S1 and S2
Fig. S1
Table S1
Text
S1. Spectral fingerprint of methane and carbon dioxide
Methane and carbon dioxide have distinct spectral fingerprints that EMIT can identify,
permitting gas retrievals and emission estimates.
The spectral fingerprints shown in Fig. S1 were
calculated
as t
he ratio of measured radiance within a gas plume divided by radiance outside of
the plume. The results for methane (
Fig. S1A)
and carbon dioxide (
Fig. S1B)
show excellent
agreement with modeled gas transmission (e.g.
unit absorption spectr
a, see
Materials and
Methods
).
Fig.
S1.
Methane and carbon dioxide spectral fingerprints with
excellent agreement with
modelled gas transmission
.
Examples of methane (A)
and
carbon dioxide (B) spectral
fingerprints (purple lines)
and
modeled gas transmission (black line).
T
he
strongest absorption
features highlighted by the vertical gray lines.
Supplement 2
. Methane and carbon dioxide plume list
The plume examples presented in this study are available through the EMIT applications
online
mapping tool
(
https://earth.jpl.nasa.gov/data/data
-
portal/Greenhouse
-
Gases
) with periodic
updates reflecting additional observed
emissions.
A summary of those methane and carbon
dioxide
plume
described in this study
are provided in the
table below
, including the
date and
time of the EMIT acquisition and the location of the estimated plume origins.
EMIT radiance
data are available through the Land Processes Distributed Active Archive Center (LP DAAC) at
the following link,
https://lpdaac.usgs.gov/products/emitl1bradv001
.
Table S1
: Summary
of
observed plumes
EMIT acquisition
Acquisition date
(mm/dd/yyyy)
Acquisition
time (UTC)
Estimated plum
e
origin latitude
Estimated plume
origin longitude
Gas
emit20220811t042630
08/11/2022
04:26:30
22.323
56.409
Methane
emit20220814t051412
08/14/2022
05:14:12
34.892
41.149
Methane
emit20220814t083654
08/14/2022
08:36:54
47.000
79.982
Methane
emit20220815t042838
08/15/2022
04:28:38
39.469
53.645
Methane
emit20220815t042838
08/15/2022
04:28:38
39.477
53.665
Methane
emit20220815t042838
08/15/2022
04:28:38
39.464
53.777
Methane
emit20220815t042838
08/15/2022
04:28:38
39.447
53.793
Methane
emit20220815t042838
08/15/2022
04:28:38
39.361
53.767
Methane
emit20220815t042838
08/15/2022
04:28:38
39.374
53.831
Methane
emit20220815t042838
08/15/2022
04:28:38
39.347
53.875
Methane
emit20220815t042838
08/15/2022
04:28:38
39.444
53.817
Methane
emit20220815t042838
08/15/2022
04:28:38
39.355
53.877
Methane
emit20220815t042838
08/15/2022
04:28:38
39.378
53.835
Methane
emit20220815t042838
08/15/2022
04:28:38
39.360
53.801
Methane
emit20220815t042838
08/15/2022
04:28:38
39.478
53.734
Methane
emit20220815t043235
08/15/2022
04:32:35
47.692
71.330
Methane
emit20220815t074645
08/15/2022
07:46:45
49.909
72.217
Methane
emit20220815t105833
08/15/2022
10:58:33
39.470
53.645
Methane
emit20220815t105833
08/15/2022
10:58:33
39.476
53.665
Methane
emit20220815t105833
08/15/2022
10:58:33
39.463
53.776
Methane
emit20220815t105833
08/15/2022
10:58:33
39.448
53.793
Methane
emit20220815t105833
08/15/2022
10:58:33
39.361
53.767
Methane
emit20220815t105833
08/15/2022
10:58:33
39.375
53.831
Methane
emit20220815t105833
08/15/2022
10:58:33
39.347
53.875
Methane
emit20220816t034409
08/16/2022
03:44:09
45.996
72.706
Methane
emit20220816t051839
08/16/2022
05:18:39
48.555
58.090
Methane
emit20220816t051839
08/16/2022
05:18:39
48.548
58.057
Methane
emit20220816t101035
08/16/2022
10:10:35
40.421
58.192
Methane
emit20220816t101058
08/16/2022
10:10:58
39.681
60.206
Methane
emit20220816t101058
08/16/2022
10:10:58
39.675
60.196
Methane
emit20220816t101058
08/16/2022
10:10:58
39.668
60.204
Methane
emit20220816t101058
08/16/2022
10:10:58
39.659
60.183
Methane
emit20220816t101158
08/16/2022
10:11:58
37.098
63.645
Methane
emit20220818t034231
08/18/2022
03:42:31
46.548
64.666
Methane
emit20220818t083506
08/18/2022
08:35:06
41.633
69.540
Methane
emit20220818t083506
08/18/2022
08:35:06
41.097
69.486
Methane
emit20220819t043116
08/19/2022
04:31:16
51.118
66.358
Methane
emit20220819t092231
08/19/2022
09:22:31
36.232
59.982
Methane
emit20220820t083324
08/20/2022
08:33:24
39.746
60.289
Methane
emit20220820t083324
08/20/2022
08:33:24
39.482
60.747
Methane
emit20220820t083324
08/20/2022
08:33:24
39.946
61.005
Methane
emit20220820t083324
08/20/2022
08:33:24
40.047
61.045
Methane
emit20220820t083411
08/20/2022
08:34:11
37.581
63.571
Methane
emit20220822t065713
08/22/2022
06:57:13
41.633
69.540
Methane
emit20220823t074504
08/23/2022
07:45:04
36.210
61.521
Methane
emit20220823t074504
08/23/2022
07:45:04
35.978
61.915
Methane
emit20220823t074504
08/23/2022
07:45:04
36.207
61.578
Methane
emit20220823t074504
08/23/2022
07:45:04
35.837
61.946
Methane
emit20220823t074504
08/23/2022
07:45:04
36.005
61.676
Methane
emit20220823t074515
08/23/2022
07:45:15
35.247
62.270
Methane
emit20220823t091950
08/23/2022
09:19:50
30.529
44.553
Methane
emit20220826t065435
08/26/2022
06:54:35
37.924
53.900
Methane
emit20220826t065435
08/26/2022
06:54:35
37.903
53.890
Methane
emit20220826t065435
08/26/2022
06:54:35
37.749
53.934
Methane
emit20220826t065435
08/26/2022
06:54:35
37.891
53.908
Methane
emit20220826t082915
08/26/2022
08:29:15
33.331
36.444
Methane
emit20220827t060619
08/27/2022
06:06:19
39.538
56.138
Methane
emit20220827t060619
08/27/2022
06:06:19
40.109
56.273
Methane
emit20220827t060642
08/27/2022
06:06:42
39.521
57.582
Methane
emit20220827t060642
08/27/2022
06:06:42
39.527
57.515
Methane
emit20220827t060642
08/27/2022
06:06:42
39.599
57.352
Methane
emit20220827t060642
08/27/2022
06:06:42
39.158
57.194
Methane
emit20220827t060642
08/27/2022
06:06:42
39.211
57.089
Methane
emit20220827t060654
08/27/2022
06:06:54
38.179
58.356
Methane
emit20220827t060730
08/27/2022
06:07:30
37.341
60.485
Methane
emit20220827t060753
08/27/2022
06:07:53
36.419
61.543
Methane
emit20220827t060753
08/27/2022
06:07:53
36.407
61.559
Methane
emit20220827t060753
08/27/2022
06:07:53
36.379
61.918
Methane
emit20220827t060753
08/27/2022
06:07:53
36.490
61.623
Methane
emit20220827t060753
08/27/2022
06:07:53
36.476
61.623
Methane
emit20220827t060753
08/27/2022
06:07:53
36.575
61.473
Methane
emit20220827t060753
08/27/2022
06:07:53
36.526
61.663
Methane
emit20220827t060753
08/27/2022
06:07:53
36.510
61.660
Methane
emit20220827t060753
08/27/2022
06:07:53
36.502
61.673
Methane
emit20220827t060753
08/27/2022
06:07:53
36.501
61.696
Methane
emit20220827t060753
08/27/2022
06:07:53
36.484
61.632
Methane
emit20220827t060753
08/27/2022
06:07:53
36.478
61.637
Methane
emit20220827t060753
08/27/2022
06:07:53
36.402
61.577
Methane
emit20220827t060753
08/27/2022
06:07:53
36.393
61.566
Methane
emit20220827t060753
08/27/2022
06:07:53
36.372
61.557
Methane
emit20220827t060753
08/27/2022
06:07:53
36.472
61.458
Methane
emit20220827t060753
08/27/2022
06:07:53
36.632
61.641
Methane
emit20220828t051853
08/28/2022
05:18:53
39.974
61.681
Methane
emit20220828t051905
08/28/2022
05:19:05
39.934
62.368
Methane
emit20220828t051905
08/28/2022
05:19:05
40.050
62.598
Methane
emit20220828t051917
08/28/2022
05:19:17
39.136
63.263
Methane
emit20220828t051929
08/28/2022
05:19:29
39.018
64.072
Methane
emit20220828t051929
08/28/2022
05:19:29
39.013
64.094
Methane
emit20220828t051941
08/28/2022
05:19:41
38.733
64.617
Methane
emit20220828t051941
08/28/2022
05:19:41
38.662
64.775
Methane
emit20220828t051941
08/28/2022
05:19:41
38.786
64.637
Methane
emit20220828t051941
08/28/2022
05:19:41
38.787
64.621
Methane
emit20220828t051941
08/28/2022
05:19:41
38.801
64.645
Methane
emit20220828t065300
08/28/2022
06:53:00
36.975
42.814
Methane
emit20220828t065324
08/28/2022
06:53:24
36.187
43.887
Methane
emit20220828t065550
08/28/2022
06:55:50
30.063
51.551
Methane
emit20220829t060627
08/29/2022
06:06:27
35.459
51.327
Methane
emit20220829t060913
08/29/2022
06:09:13
27.390
60.255
Methane
emit20220829t060913
08/29/2022
06:09:13
27.262
60.694
Methane
emit20220830t065244
08/30/2022
06:52:44
33.324
36.443
Methane
emit20220831t060702
08/31/2022
06:07:02
29.049
47.586
Methane
emit20220831t060702
08/31/2022
06:07:02
28.956
47.962
Methane
emit20220831t060702
08/31/2022
06:07:02
29.169
47.924
Methane
emit20220901t034318
09/01/2022
03:43:18
38.561
65.950
Methane
emit20220901t034318
09/01/2022
03:43:18
38.313
66.071
Methane
emit20220901t034318
09/01/2022
03:43:18
38.483
65.990
Methane
emit20220901t034318
09/01/2022
03:43:18
38.497
66.011
Methane
emit20220901t034318
09/01/2022
03:43:18
38.516
66.002
Methane
emit20220901t034318
09/01/2022
03:43:18
38.542
66.004
Methane
emit20220901t034318
09/01/2022
03:43:18
38.536
65.950
Methane
emit20220901t034318
09/01/2022
03:43:18
38.533
65.927
Methane
emit20220901t034318
09/01/2022
03:43:18
38.537
65.890
Methane
emit20220901t034318
09/01/2022
03:43:18
38.521
65.883
Methane
emit20220901t051709
09/01/2022
05:17:09
35.482
45.447
Methane
emit20220901t051720
09/01/2022
05:17:20
35.180
47.010
Methane
emit20220901t051920
09/01/2022
05:19:20
29.740
53.248
Methane
emit20220901t051932
09/01/2022
05:19:32
29.737
53.251
Methane
emit20220901t052019
09/01/2022
05:20:19
27.182
56.078
Methane
emit20220901t052019
09/01/2022
05:20:19
27.114
55.986
Methane
emit20220903t051924
09/03/2022
05:19:24
24.413
47.019
Methane
emit20220903t051924
09/03/2022
05:19:24
24.537
46.894
Methane
emit20220903t051924
09/03/2022
05:19:24
24.609
46.896
Methane
emit20220903t051924
09/03/2022
05:19:24
24.489
46.942
Methane
emit20220815t025827
08/15/2022
02:58:27
44.898
89.042
Carbon
dioxide
emit20220815t025827
08/15/2022
02:58:27
44.864
89.009
Carbon
dioxide
emit20220903t051924
09/03/2022
05:19:24
24.413
47.012
Carbon
dioxide