KMap
My research focuses on Earth's climate variability and paleoceanography. I am interested in learning about the causes and mechanisms of past fluctuations in the ocean and atmosphere, and how such information can help us anticipate future changes. To do so, I use a combination of observations, geochemical proxy measurements, and modeling simulations to identify and investigate important processes at play in the Earth-climate system. Primarily, my work involves stable isotopic and trace metal geochemistry of (mainly) carbonate archives (e.g. corals/foraminifera/snails/stalagmites) as well as the analysis of climate model simulations. I am also interested in extreme climate events and hazards (earthquakes, flooding, heatwaves, sea-level changes), and how the geological record can help inform future projections. Ongoing research projects include Indo-Pacific climate change, reconstructing Atlantic Ocean circulation anomalies, Indian paleomonsoon variability, and uncertainty in proxy-model comparisons. Please email reach out via email if you’re an undergraduate student seeking research experience, a potential M.S./Ph.D. student, or if you’d like to explore postdoctoral options.

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Courses
  • P
    Paleoclimatology

  • P
    Paleontology

  • THEC
    The History of Earth's Climate

  • IO
    Introduction to Oceanography

  • SIGP
    Stable Isotope Geochemistry and Paleoclimate

Grants
  • Funding agency logo
    Collaborative Research: Tracing Pacific Ocean Circulation and Ventilation During the Warm Pliocene Epoch

    Co-Investigator (COI)

    2023

    $544.8K
    Active
  • Funding agency logo
    Track 2 MRI: Acquisition of a mini carbon dating system for multi-millennial, multi-user sequences of annually resolved 14C and other high precision applications

    Co-Investigator (COI)

    2022

    $2.0M
    Active
  • Funding agency logo
    Track 2 MRI: Acquisition of a mini carbon dating system for multi-millennial, multi-user sequences of annually resolved 14C and other high precision applications

    Co-Investigator (COI)

    2022

    $752.0K
    Active
  • Funding agency logo
    REU Site: From the clouds to the core: A place-based REU for southwestern US community/tri bal college students to increase under-represented group recruitment to the geosciences

    Co-Investigator (COI)

    2022

    $133.6K
    Active
  • Funding agency logo
    Collaborative Research: P2C2--Subdecadal Pleistocene Indian Monsoon Variability: A Dual Archive Perspective

    Principal Investigator (PI)

    2021

    $416.6K
    Active
  • Funding agency logo
    Collaborative Research: P2C2 - Variability, Impacts and Extremes of the ENSO-Asian Monsoon Relationship over the Common Era

    Principal Investigator (PI)

    2021

    $46.0K
    Active
  • Funding agency logo
    Collaborative Research: Testing The Indian Ocean El Nino Hypothesis

    Principal Investigator (PI)

    2019

    $394.5K
    Active
  • Funding agency logo
    Geochemical Reconstructions of Tropical-to-Subtropical Atlantic Ocean Climate Variability

    Principal Investigator (PI)

    2019

    $75.0K
    Active
  • Funding agency logo
    Collaborative Research: Global Ocean Repeat Hydrography, Carbon, and Tracer Measurements, 2015-2020

    Principal Investigator (PI)

    2021

    $8.3K
News
  • Climate Change Could Reawaken Indian Ocean El Niño

    2020

Publications (60)
Recent
  • span style= font-size:12pt; Hydrologic controls on individual ostracode stable isotopes in a desert lake: a modern baseline for Lake Turkana /span

    2022

  • When Eastern India Oscillated Between Desert Versus Savannah‐Dominated Vegetation

    2022

  • Remote and local drivers of Pleistocene South Asian summer monsoon precipitation: A test for future predictions

    2021

  • Abrupt Southern Great Plains thunderstorm shifts linked to glacial climate variability

    2021

  • Unprecedented drought in South India and recent water scarcity

    2021

  • Paleovegetation dynamics in an alternative stable states landscape in the montane Western Ghats, India

    2021

  • Uncertainty in palaeosalinity estimates from foraminiferal geochemical records in the northern Indian Ocean

    2021

  • Orbitally driven evolution of Asian monsoon and stable water isotope ratios during the Holocene: Isotope-enabled climate model simulations and proxy data comparisons

    2021

  • Discerning Changes in High-Frequency Climate Variability Using Geochemical Populations of Individual Foraminifera

    2021

  • Holocene Evolution of Sea-Surface Temperature and Salinity in the Gulf of Mexico

    2021

  • Methane, Monsoons, and Modulation of Millennial‐Scale Climate

    2020

  • Palaeoclimate perspectives on the Indian Ocean Dipole

    2020

  • Evolution of the Oligotrophic West Pacific Warm Pool During the Pliocene‐Pleistocene Boundary

    2020

  • Emergence of an equatorial mode of climate variability in the Indian Ocean

    2020

  • Author Correction: Future exacerbation of hot and dry summer monsoon extremes in India

    2020

  • Indian subcontinent hydroclimate and vegetation changes during the last glacial reconstructed by leaf wax stable isotope and pollen analyses on sediments from IODP Site U1446, NW Bay of Bengal

    2020

  • Paleovegetation dynamics in a montane vegetation mosaic in the Western Ghats, India: evidence for alternative stable states in the past?

    2020

  • Monsoon reconstructions using bulk and individual foraminiferal analyses in marine sediments offshore India

    2020

  • Past climates inform our future

    2020

  • A Brief Commentary on the Interpretation of Chinese Speleothem δ¹⁸O Records as Summer Monsoon Intensity Tracers

    2020

  • Evolution of the oligotrophic West Pacific Warm Pool during the Pliocene

    2020

  • Lessons from a high-CO 2 world: an ocean view from~ 3 million years ago

    2020

  • Future exacerbation of hot and dry summer monsoon extremes in India

    2020

  • The Climate Data Toolbox for MATLAB

    2019

  • It's Time to Shift Emphasis Away from Code Sharing

    2019

  • Bayesian calibration of the Mg/Ca paleothermometer in planktic foraminifera

    2019

  • A century of reduced ENSO variability during the Medieval Climate Anomaly

    2019

  • Methane, Monsoons, and Modulation of Millennial-scale Climate

    2019

  • A comment on 'On the validity of foraminifera-based ENSO reconstructions' by Kaustubh Thirumalai

    2019

  • PaCTS 1.0: A Crowdsourced Reporting Standard for Paleoclimate Data

    2019

  • An El Niño Mode in the Glacial Indian Ocean?

    2019

  • Considerations for Globigerinoides ruber (White and Pink) Paleoceanography: Comprehensive Insights From a Long‐Running Sediment Trap

    2019

  • Considerations for Globigerinoides ruber (white and pink) paleoceanography: comprehensive insights from a long-running sediment trap

    2019

  • Significant seasonal contrast in the Arabian Sea during deglaciation: Evidence from oxygen isotopic analyses of individual planktic foraminifera

    2019

  • Neoglacial Climate Anomalies and the Harappan Metamorphosis

    2018

  • Supplementary material to "Neoglacial Climate Anomalies and the Harappan Metamorphosis"

    2018

  • Single foraminifera Mg/Ca analyses of past glacial-interglacial temperatures derived from G. ruber sensu stricto and sensu lato morphotypes

    2018

  • A fresh take on ancient climate change in the North Pacific

    2018

  • Interactive comment on ``Re-examining the 4.2 ka BP event in foraminifer isotope records from the Indus River delta in the Arabian Sea'' by Alena Giesche et al.

    2018

  • Pronounced centennial-scale Atlantic Ocean climate variability correlated with Western Hemisphere hydroclimate

    2018

  • Multi-species coral Sr/Ca-based sea-surface temperature reconstruction using Orbicella faveolata and Siderastrea siderea from the Florida Straits

    2017

  • Modeling the stable water isotope expression of El Ni~no in the Pliocene: Implications for the interpretation of proxy data

    2017

  • Extreme Monsoon Rainfall Signatures Preserved in the Invasive Terrestrial Gastropod Lissachatina fulica

    2017

  • Extreme temperatures in Southeast Asia caused by El Niño and worsened by global warming

    2017

  • A global multiproxy database for temperature reconstructions of the Common Era

    2017

  • Expedition 353 methods

    2016

  • Potential for paleosalinity reconstructions to provide information about AMOC variability

    2016

  • Relative sea-level changes during the last century recorded by coral microatolls in Belloc, Haiti

    2016

  • Early onset of industrial-era warming across the oceans and continents

    2016

  • Constraining past seawater $δ$18O and temperature records developed from foraminiferal geochemistry

    2016

  • Oyster reef die-offs in stratigraphic record of Corpus Christi Bay, Texas, possibly caused by drought-driven extreme salinity changes

    2015

  • The use of $δ$13C values of leporid teeth as indicators of past vegetation

    2015

  • Robust global ocean cooling trend for the pre-industrial Common Era

    2015

  • Variable Holocene deformation above a shallow subduction zone extremely close to the trench

    2015

  • Stable carbon isotopes in dissolved inorganic carbon: extraction and implications for quantifying the contributions from silicate and carbonate weathering in the Krishna River system during peak discharge

    2014

  • Globigerinoides ruber morphotypes in the Gulf of Mexico: A test of null hypothesis

    2014

  • Persistent decadal-scale rainfall variability in the tropical South Pacific Convergence Zone through the past six centuries

    2013

  • Statistical constraints on El Ni~no Southern Oscillation reconstructions using individual foraminifera: A sensitivity analysis

    2013

  • Climate Change in the Marine Realm: "An International Summer School in the Framework of the European Campus of Excellence"

    2013

  • A MATLAB(TM) code to perform weighted linear regression with (correlated or uncorrelated) errors in bivariate data

    2011

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