Anand Gnanadesikan


327 Olin Hall
Curriculum Vitae
Personal Website
Google Scholar Profile


Anand Gnanadesikan trained as an oceanographer. His primary expertise is in how the ocean circulates and influences marine life, climate, and atmospheric chemistry. Gnanadesikan earned his PhD from the MIT/Woods Hole Joint Program in physical oceanography and spent more than 15 years at Princeton University and NOAA’s Geophysical Fluid Dynamics Laboratory working to develop computer models of how the planet works.

He joined the John Hopkins faculty in January 2011.

I use numerical models and large datasets to explore how the ocean interacts with the biosphere, atmosphere and cryosphere. Areas of particular interest include:

1. The role of mixing in setting the large scale circulation and chemical properties of the ocean. Because the ocean is strongly stratified and weakly forced, exchange between the deep interior and surface can take many, many years. I’ve looked at the role of breaking internal waves which mix in the vertical in driving this exchange- arguing that they play a much smaller role than previously thought. By contrast, the oceanic equivalent of weather systems are much more important.

2. Modeling ocean biology and chemistry: My interests in understanding vertical exchange has led to a productive line of research looking at oceanic tracers, which are often more sensitive to mixing than are temperature and salinity. Particular interests include radiocarbon and open-ocean hypoxia. I’m also interested in ways that biological cycling can feed back on the physical climate, through altering the carbon cycle and ocean color.

3. Understanding variability in the Earth System: My interests here lie in understanding the physics by which the climate system changes on time scales ranging from annual to multimillennial. The Southern Ocean is a primary region of interest here, though in recent years I’ve started looking more at tropical variability and the North Atlantic as well.

270.103: Introduction to Global Environmental Change and Sustainability
270.224: Oceans and Atmospheres (Spring semester)
270.323: Ocean Biogeochemical Cycles (Even year spring semester)
270.325: Introductory Oceanography (Odd year spring semester)
270.611: Advanced Atmospheric Dynamics
270.644: Physics of Climate Variability (next taught Fall 2014)
270.645: Earth System Modeling

Displaying the 20 most recent publications. View the Google Scholar Profile for complete publications list.

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AM Russell, A Gnanadesikan, B Zaitchik
Are the Central Andes Mountains a Warming Hot Spot?
Journal of Climate 30 (10), 3589-3608, 2017

WJM Seviour, A Gnanadesikan, D Waugh, MA Pradal
Transient Response of the Southern Ocean to Changing Ozone: Regional Responses and Physical Mechanisms
Journal of Climate 30 (7), 2463-2480, 2017

GE Kim, A Gnanadesikan, MA Pradal
Increased Surface Ocean Heating by Colored Detrital Matter (CDM) Linked to Greater Northern Hemisphere Ice Formation in the GFDL CM2Mc ESM
Journal of Climate 29 (24), 9063-9076, 2016

S Rivero‐Calle, CE Del Castillo, A Gnanadesikan, A Dezfuli, B Zaitchik, ...
Interdecadal Trichodesmium variability in cold North Atlantic waters
Global Biogeochemical Cycles 30 (11), 1620-1638, 2016

WJM Seviour, A Gnanadesikan, DW Waugh
The transient response of the Southern Ocean to stratospheric ozone depletion
Journal of Climate 29 (20), 7383-7396, 2016

E Ramudu, BH Hirsh, P Olson, A Gnanadesikan
Turbulent heat exchange between water and ice at an evolving ice–water interface
Journal of Fluid Mechanics 798, 572-597, 2016

J Dunne
Simplified ocean biogeochemistry (BLING)
https://www. gfdl. noaa. gov/, 2016

A Gnanadesikan
Anand Gnanadesikan’s Ocean Color Page
https://www. gfdl. noaa. gov/, 2016

R Hallberg
CM2M and CM2G
https://www. gfdl. noaa. gov/, 2016

A Gnanadesikan
https://www. gfdl. noaa. gov/, 2016

A Gnanadesikan
2009 Paleocene-Eocene Thermal Maximum
https://www. gfdl. noaa. gov/, 2016

W Anderson
Ocean color and tropical cyclones
https://www. gfdl. noaa. gov/, 2016

A Gnanadesikan
Global Overturning Circulation
https://www. gfdl. noaa. gov/, 2016

A Gnanadesikan
Ocean Models at GFDL
https://www. gfdl. noaa. gov/, 2016

A Gnanadesikan
Anand’s Annotated Bibliography on the Global Overturning
https://www. gfdl. noaa. gov/, 2016

A Gnanadesikan
Global Nutrient Cycling
https://www. gfdl. noaa. gov/, 2016

S Sedigh Marvasti, A Gnanadesikan, AA Bidokhti, JP Dunne, S Ghader
Challenges in modeling spatiotemporally varying phytoplankton blooms in the Northwestern Arabian Sea and Gulf of Oman
Biogeosciences 13 (4), 1049-1069, 2016

E Ramudu, D Yang, R Gelderloos, CV Meneveau, A Gnanadesikan
A Large Eddy Simulation Study of Heat Entrainment under Sea Ice in the Canadian Arctic Basin
AGU Fall Meeting Abstracts, 2016

BF Zaitchik, A Russell, A Gnanadesikan
Analyzing Multidecadal Trends in Cloudiness Over the Subtropical Andes Mountains of South America Using a Regional Climate Model.
AGU Fall Meeting Abstracts, 2016

MAS Pradal, A Gnanadesikan, RP Abernathey
Impact of space dependent eddy mixing on large ocean circulation
AGU Fall Meeting Abstracts, 2016