Content Provider
PANGAEA - Data Publisher for Earth & Environmental Science
27,280
DataCite Metadata Store (German National Library of Science and Technology)
21,976
NOAA NCEI Environmental Data Archive (via DataONE)
7,308
Unknown
6,387
DataCite
5,326
Directory of Open Access Journals: DOAJ Articles
4,918
Zenodo
3,282
Wiley Online Library
3,100
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2,924
Digital.CSIC (Spanish National Research Council)
2,621
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
2,119
Institut national des sciences de l'Univers: HAL-INSU
2,113
Copernicus Publications: E-Journals
1,972
Université de Nantes: HAL-UNIV-NANTES
1,844
Defense Technical Information Center: DTIC Technical Reports database
1,557
LeibnizOpen (The Leibniz Association)
1,556
Springer Nature (via Crossref)
1,515
Instituto Español de Oceanografía: e-IEO
1,478
PubMed Central (PMC)
1,354
ScienceDirect (Elsevier - via Crossref)
1,334
USGS Science Data Catalog (via DataONE)
1,316
Niedersächsisches Online-Archiv NOA
1,303
University of Southampton: e-Prints Soton
1,251
Natural Environment Research Council: NERC Open Research Archive
1,208
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
1,178
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1,083
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
987
ScienceDirect (Elsevier)
921
Cambridge University Press
874
HAL Sorbonne Université
863
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
816
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
788
Biological and Chemical Oceanography Data Management Office (BCO-DMO) (via DataONE)
768
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
764
Max Planck Society: MPG.PuRe
725
University of California: eScholarship
703
David Rumsey Historical Map Collection (Cartography Associates)
676
University of St Andrews: Research Portal
569
CentAUR: Central Archive at the University of Reading
563
HighWire Press (Stanford University)
549
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
548
MDPI Open Access Publishing
543
Biodiversity Heritage Library (BHL)
525
Université de Bretagne Occidentale: HAL
511
Frontiers: Figshare
505
RePEc (Research Papers in Economics)
493
Oxford University Press
461
École Polytechnique, Université Paris-Saclay: HAL
457
Archives ouvertes de Paris-Saclay
456
NASA Technical Reports Server (NTRS)
434
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