2026 Gregory J. Hakim: Environmental Sciences Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Environmental Sciences	44	6735	6467	2405	2233	178	7514

Overview

Gregory J. Hakim is affiliated with the University of Washington in the United States. Their research spans multiple fields and topics related to Earth sciences and environmental studies.

Hakim's main fields of study include:

Earth and Planetary Sciences
Environmental Science

Within these areas, their work delves into subfields such as:

Atmospheric Science
Global and Planetary Change
Oceanography
Environmental Engineering
Information Systems

Their research addresses a range of main topics, including:

Climate variability and models
Geology and Paleoclimatology Research
Meteorological Phenomena and Simulations
Atmospheric and Environmental Gas Dynamics
Tree-ring climate responses
Cryospheric studies and observations
Arctic and Antarctic ice dynamics

Hakim's recent publications include:

"Glacial cooling and climate sensitivity revisited" (2020, Nature)
"Globally resolved surface temperatures since the Last Glacial Maximum" (2021, Nature)
"Rate of mass loss from the Greenland Ice Sheet will exceed Holocene values this century" (2020, Nature)
"Spatial patterns of climate change across the Paleocene-Eocene Thermal Maximum" (2022, Proceedings of the National Academy of Sciences)
"Resolving the Differences in the Simulated and Reconstructed Temperature Response to Volcanism" (2020, Geophysical Research Letters)

The scientist has coauthored frequently with a group of collaborators, including:

Jérôme Patoux
Julien Emile-Geay
Jonathan King
Eric J. Steig
Feng Zhu

Hakim has also contributed to book publications, notably with Cambridge University Press, where they authored a book titled Weather published in 2021.

Their work has appeared primarily in the following publication venues:

Zenodo (CERN European Organization for Nuclear Research)
Geophysical Research Letters
Journal of Climate
Weather
arXiv (Cornell University)

Best Publications

Globally resolved surface temperatures since the Last Glacial Maximum.

Matthew B Osman;Jessica E Tierney;Jiang Zhu;Robert Tardif

496
Citations
Glacial cooling and climate sensitivity revisited

Jessica Erin Tierney;Jiang Zhu;Jiang Zhu;Jonathan King;Steven Brewster Malevich

450
Citations
Consistent multi-decadal variability in global temperature reconstructions and simulations over the Common Era.

Raphael Neukom;Luis A. Barboza;Michael P. Erb;Feng Shi

437
Citations
The last millennium climate reanalysis project: Framework and first results

Gregory J. Hakim;Julien Emile-Geay;Eric J. Steig;David Noone

313
Citations
Comparing Adjoint- and Ensemble-Sensitivity Analysis with Applications to Observation Targeting

Brian Ancell;Gregory J. Hakim

289
Citations
Ensemble-Based Sensitivity Analysis

Ryan D. Torn;Gregory J. Hakim

279
Citations
Boundary Conditions for Limited-Area Ensemble Kalman Filters

Ryan D. Torn;Gregory J. Hakim;Chris Snyder

273
Citations
Last Millennium Reanalysis with an expanded proxy database and seasonal proxy modeling

Robert Tardif;Gregory J. Hakim;Walter A. Perkins;Kaleb A. Horlick

247
Citations
The 1993 Superstorm Cold Surge: Frontal Structure, Gap Flow, and Tropical Impact

David M. Schultz;W. Edward Bracken;Lance F. Bosart;Gregory J. Hakim

186
Citations
Assimilation of Time-Averaged Pseudoproxies for Climate Reconstruction

Nathan J. Steiger;Gregory J. Hakim;Eric J. Steig;David S. Battisti

185
Citations
The Ohio Valley Wave-Merger Cyclogenesis Event of 25–26 January 1978. Part II: Diagnosis Using Quasigeostrophic Potential Vorticity Inversion

Gregory J. Hakim;Daniel Keyser;Lance F. Bosart

160
Citations
Spatial patterns of climate change across the Paleocene–Eocene Thermal Maximum

Unknown

144
Citations
A New Surface Model for Cyclone–Anticyclone Asymmetry

Gregory J. Hakim;Chris Snyder;David J. Muraki

127
Citations
Rate of mass loss from the Greenland Ice Sheet will exceed Holocene values this century

Jason P. Briner;Joshua K. Cuzzone;Joshua K. Cuzzone;Jessica A. Badgeley;Nicolás E. Young

124
Citations
Ensemble Synoptic Analysis

Gregory J. Hakim;Ryan D. Torn

119
Citations
Developing Wave Packets in the North Pacific Storm Track

Gregory J. Hakim

118
Citations
Large-Scale Antecedent Conditions Associated with the 12 14 March 1993 Cyclone (``Superstorm '93'') over Eastern North America

Lance F. Bosart;Gregory J. Hakim;Kevin R. Tyle;Mary A. Bedrick

114
Citations
Initial Condition Sensitivity of Western Pacific Extratropical Transitions Determined Using Ensemble-Based Sensitivity Analysis

Ryan D. Torn;Gregory J. Hakim

113
Citations
Performance Characteristics of a Pseudo-Operational Ensemble Kalman Filter

Ryan D. Torn;Gregory J. Hakim

104
Citations
Composite Structure of Tropopause Polar Cyclones

Steven M. Cavallo;Gregory J. Hakim

102
Citations
The Ohio Valley Wave-Merger Cyclogenesis Event of 25–26 January 1978. Part I: Multiscale Case Study

Gregory J. Hakim;Lance F. Bosart;Daniel Keyser

98
Citations
Chapter 12 – Middle Atmosphere Dynamics

James R. Holton;Gregory J. Hakim

68
Citations
Glacial cooling and climate sensitivity revisited

Jessica E Tierney;Steven B Malevich;Jiang Zhu;Jonathan King

35
Citations

Frequent Co-Authors

Eric J. Steig University of Washington

Julien Emile-Geay University of Southern California

David Noone University of Auckland

Kevin J. Anchukaitis University of Arizona

Jessica E. Tierney University of Arizona

Lance F. Bosart University at Albany, State University of New York

Jason P. Briner University at Buffalo, State University of New York

Mathieu Morlighem Dartmouth College

Eric Larour California Institute of Technology

David M. Schultz University of Manchester

External Links

Personal website of Gregory J. Hakim

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