Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
2,911
Unknown
380
NOAA NCEI Environmental Data Archive (via DataONE)
375
Directory of Open Access Journals: DOAJ Articles
368
PANGAEA - Data Publisher for Earth & Environmental Science
292
Institute for Marine Research: Brage IMR
236
University of Tromsø: Munin Open Research Archive
224
Zenodo
143
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
137
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
86
Frontiers: Figshare
82
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
78
Arctic Data Center (via DataONE)
78
Copernicus Publications: E-Journals
77
Defense Technical Information Center: DTIC Technical Reports database
75
PubMed Central (PMC)
73
University of Bergen: Bergen Open Research Archive (BORA-UiB)
73
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
58
MDPI Open Access Publishing
57
Natural Environment Research Council: NERC Open Research Archive
53
LeibnizOpen (The Leibniz Association)
50
Springer Nature (via Crossref)
45
CyberLeninka (Scientific Electronic Library)
42
Polar Research (E-Journal)
42
Niedersächsisches Online-Archiv NOA
41
HighWire Press (Stanford University)
40
Université de Nantes: HAL-UNIV-NANTES
40
Wiley Online Library
40
NTNU Open Archive (Norwegian University of Science and Technology)
37
Digital.CSIC (Spanish National Research Council)
35
Cambridge University Press
33
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
32
Institut national des sciences de l'Univers: HAL-INSU
32
University of Southampton: e-Prints Soton
31
Dryad Digital Repository (Duke University)
29
University of Tromsø: Septentrio Academic Publishing
28
Wiley Online Library (via Crossref)
28
ScienceDirect (Elsevier - via Crossref)
27
Max Planck Society: MPG.PuRe
23
University of Calgary Journal Hosting
22
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
22
University of Stavanger: UiS Brage
21
Aarhus University: Research
18
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
18
Wageningen UR (University & Research Centre): Digital Library
17
ARPI - Archivio della Ricerca dell'Università di Pisa
16
NORA (National aggregator of open repositories of Russian universities)
16
Norwegian Institute for Water research: NIVA Open Access Archive (Brage)
16
Norwegian Polar Data Centre
16
University of Southern Denmark Research Portal
16
more ...