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Harig, Christopher
5
Hay, Carling C.
5
Kopp, Robert E.
5
Laytchev, Konstantin
5
M. A. K. Khalil
5
Mitrovica, Jerry X.
5
R. A. Rasmussen
5
C. D. Keeling
4
H.A.J. Meijer
4
J. van der Plicht
4
Keeling, Ralph F.
4
M.H. Pertuisot
4
Muir, John
4
T. P. Whorf
4
Bernhard, G.
3
Booth, C. R.
3
Brunt, Kelly M.
3
Busetto, M.
3
Dutton, E. G.
3
Khalil, M. A. K.
3
König-Langlo, Gert
3
Lanconelli, C.
3
Larsen, Christopher F.
3
Maturilli, Marion
3
Meijer, H.A.J.
3
Neumann, Thomas A.
3
Pertuisot, M.H.
3
Rasmussen, R. A.
3
Sieger, Rainer
3
Vitale, V.
3
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54 ENVIRONMENTAL SCIENCES
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Apr
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Atmosphere
8
Aug
8
Dec
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Feb
8
Infrared Gas Analyzer
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Jan
8
Jun
8
Mar
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May
8
Nov
8
Oct
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Alaska
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Carbon dioxide
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14C
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Alert Canada
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Alert, NWT, Canada
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Amundsen
5
Annual
5
Annual-Fitted
5
Atmospheric 14C
5
Atmospheric 14CO2
5
Atmospheric C14
5
Atmospheric CO2 Concentration
5
Atmospheric Carbon Dioxide
5
Baring Head
5
Barrow, Alaska
5
C14
5
Cape Kumukahi
5
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DataCite Metadata Store (German National Library of Science and Technology)
18
ESS-DIVE: Deep Insight for Earth Science Data (via DataONE)
15
University of Washington, Seattle: Digital Collections
7
Unknown
7
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
6
University of Alaska: ScholarWorks@UA
5
Washington State University: WSU Libraries Digital Collections
5
Directory of Open Access Journals: DOAJ Articles
4
NASA Technical Reports Server (NTRS)
3
National Institute of Polar Research Repository, Japan
3
Zenodo
3
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
2
Cambridge University Press
2
Copernicus Publications: E-Journals
2
David Rumsey Historical Map Collection (Cartography Associates)
2
Defense Technical Information Center: DTIC Technical Reports database
2
Niedersächsisches Online-Archiv NOA
2
North Dakota State University (NDSU): Digital Horizons
2
University of Groningen research database
2
University of North Texas: UNT Digital Library
2
University of the Pacific, McGeorge School of Law: Scholarly Commons
2
University of the Pacific: Scholarly Commons
2
AAAS Resource Center (American Association for the Advancement of Science)
1
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
1
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
BioOne Online Journals
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Hathi Trust Digital Library
1
IEDA: US Antarctic Program Data Center (via DataONE)
1
IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis)
1
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South Pole
123
Arctic
35
Antarctic
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Canada
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Greenland
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Fairbanks
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Pacific
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North Pole
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Scripps
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New Zealand
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Palmer Station
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Palmer-Station
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Grim
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Norway
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Neumayer
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Northwest Passage
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Ny-Ålesund
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The Antarctic
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Svalbard
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Byrd
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Dronning Maud Land
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Greenwich
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Svalbard Archipelago
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Amundsen Scott South Pole Station
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Amundsen-Scott
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Amundsen-Scott South Pole Station
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Argentina
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Austral
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Hallett
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Kum
4
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Alaska
South pole
Antarc*
87
Antarctica
65
Barrow
58
Arctic
38
Antarctic
33
Greenland
19
North Pole
17
Point Barrow
17
Ice Sheet
10
Northwest passage
9
Ny Ålesund
9
Ny-Ålesund
9
Sea ice
9
Amundsen-Scott
8
Ice
8
Svalbard
8
glacier
8
north slope
8
permafrost
8
Archipelago
7
Brooks Range
7
Cosmonaut sea
7
Dronning Maud Land
7
IPY
7
International Polar Year
7
Nome
6
glaciers
6
Airborne Topographic Mapper
5
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