Kaustubh Thirumalai
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View article: River drought forcing of the Harappan metamorphosis
River drought forcing of the Harappan metamorphosis Open
Hydroclimatic variations are among the factors shaping the rise and fall of the Indus Valley Civilization. Yet, constraining the role of water availability across this vast region has remained challenging owing to the scarcity of site-spec…
View article: Common Era time-transgressive forcing of Caribbean water balance
Common Era time-transgressive forcing of Caribbean water balance Open
Tropical North Atlantic sea surface temperatures and low-latitude rainfall covary, but prehistoric subtropical rainfall records are often misaligned. Here, a submarine groundwater discharge record from the northern Bahamas archives regiona…
View article: Recent drying of the Ganga River is unprecedented in the last 1,300 years
Recent drying of the Ganga River is unprecedented in the last 1,300 years Open
The Ganga River basin, critical to over 600 million people, is experiencing a severe and unprecedented drying trend, threatening water and food security. Using streamflow reconstructions spanning 1,300 y (700–2012 C.E.) from instrumental d…
View article: Decoupling short- and long-term methane seepage dynamics: high-resolution insights from Pyrgo spp. δ¹³C records at Woolsey Mound, Gulf of Mexico
Decoupling short- and long-term methane seepage dynamics: high-resolution insights from Pyrgo spp. δ¹³C records at Woolsey Mound, Gulf of Mexico Open
View article: INSIGHTS FROM GROWING <i>GLOBOROTALIA TRUNCATULINOIDES</i> AND <i>GLOBOROTALIA MENARDII</i> IN THE LABORATORY
INSIGHTS FROM GROWING <i>GLOBOROTALIA TRUNCATULINOIDES</i> AND <i>GLOBOROTALIA MENARDII</i> IN THE LABORATORY Open
The vast majority of planktic foraminiferal culture studies have been carried out on spinose species of foraminifera, with relatively few studies on non-spinose species. We conducted a pilot study to test whether live specimens of the non-…
View article: Snapshots of mid-to-late Holocene sea-surface temperature variability from a subtropical western Atlantic coral reef
Snapshots of mid-to-late Holocene sea-surface temperature variability from a subtropical western Atlantic coral reef Open
View article: Greening of India and revival of the South Asian summer monsoon in a warmer world
Greening of India and revival of the South Asian summer monsoon in a warmer world Open
View article: Paired X‐Ray Micro CT Scanning and Individual Foraminifera Isotopic Analysis Reveal (De)coupled Changes in Carbonate Preservation and Temperature
Paired X‐Ray Micro CT Scanning and Individual Foraminifera Isotopic Analysis Reveal (De)coupled Changes in Carbonate Preservation and Temperature Open
The composition and preservation state of biogenic carbonate archives, such as foraminiferal tests, record ocean chemistry during the lifetime of the organism and post‐depositional changes in ambient conditions via carbonate compensation. …
View article: Future increase in extreme El Nino supported by past glacial changes
Future increase in extreme El Nino supported by past glacial changes Open
View article: Identical stable isotopic signatures in Globigerinoides ruber morphotypes from northeastern Indian Ocean coretops
Identical stable isotopic signatures in Globigerinoides ruber morphotypes from northeastern Indian Ocean coretops Open
Globigerinoides ruber (white) is a mixed layer planktic foraminifera cosmopolitan to the tropical and subtropical oceans. G. ruber (white) has two principal morphotypes: sensu stricto (s.s.) and sensu lato (s.l.). Previous geochemical stud…
View article: An Inconsistent ENSO Response to Northern Hemisphere Stadials Over the Last Deglaciation
An Inconsistent ENSO Response to Northern Hemisphere Stadials Over the Last Deglaciation Open
The dynamics shaping the El Niño‐Southern Oscillation's (ENSO) response to present and future climate change remain unclear, partly due to limited paleo‐ENSO records spanning past abrupt climate events. Here, we measure Mg/Ca ratios on ind…
View article: Shell Reworking Impacts on Climate Variability Reconstructions Using Individual Foraminiferal Analyses
Shell Reworking Impacts on Climate Variability Reconstructions Using Individual Foraminiferal Analyses Open
Particle mixing by benthic fauna beneath the sediment‐water interface (or bioturbation) fundamentally challenges the proxy based retrieval of past climatic conditions from deep‐sea sediment cores. Previous efforts targeted the impacts of b…
View article: Indian Ocean variability changes in the Paleoclimate Modelling Intercomparison Project
Indian Ocean variability changes in the Paleoclimate Modelling Intercomparison Project Open
The Indian Ocean exhibits multiple modes of interannual climate variability, whose future behaviour is uncertain. Recent analysis of glacial climates has uncovered an additional El Niño-like equatorial mode in the Indian Ocean, which …
View article: Geochemical and morphometric measurements of individual planktic foraminiferal tests from the eastern tropical Indian Ocean, Ninetyeast Ridge
Geochemical and morphometric measurements of individual planktic foraminiferal tests from the eastern tropical Indian Ocean, Ninetyeast Ridge Open
These two spreadsheets present geochemical (δ¹⁸O, δ¹³C, Mg/Ca) and morphometric (mass, L1, and L2) measurements of individual shells belonging to various species of planktic foraminifera from the Ninetyeast Ridge in the Indian Ocean from u…
View article: Geochemical and morphometric measurements of individual planktic foraminiferal tests from the eastern tropical Indian Ocean, Ninetyeast Ridge
Geochemical and morphometric measurements of individual planktic foraminiferal tests from the eastern tropical Indian Ocean, Ninetyeast Ridge Open
These two spreadsheets present geochemical (δ¹⁸O, δ¹³C, Mg/Ca) and morphometric (mass, L1, and L2) measurements of individual shells belonging to various species of planktic foraminifera from the Ninetyeast Ridge in the Indian Ocean from u…
View article: Late Miocene-Early Pliocene Hydroclimate Evolution of the Western Altiplano, Northern Chile: Implications for Aridity Trends Under Warming Climate Conditions
Late Miocene-Early Pliocene Hydroclimate Evolution of the Western Altiplano, Northern Chile: Implications for Aridity Trends Under Warming Climate Conditions Open
View article: Morphotypical and Geochemical Variations of Planktic Foraminiferal Species in Siberian and Central Arctic Ocean Core Tops
Morphotypical and Geochemical Variations of Planktic Foraminiferal Species in Siberian and Central Arctic Ocean Core Tops Open
In this work, we utilize a transect of core top, mid- to late Holocene, sediments from the Eastern Siberian Sea to the central Arctic Ocean, spanning gradients in upper-ocean water column properties, to examine regional planktic foraminife…
View article: Solar Irradiance Modulates the Asian Summer Monsoon—ENSO Relationship Over the Last Millennium
Solar Irradiance Modulates the Asian Summer Monsoon—ENSO Relationship Over the Last Millennium Open
The Asian summer monsoon (ASM) is teleconnected to the El Niño Southern Oscillation (ENSO), but this relationship is nonstationary and has shifted significantly in recent decades. Characterizing the drivers of such shifts is crucial for im…
View article: The Dos and Don’ts of Peer Reviewing
The Dos and Don’ts of Peer Reviewing Open
Guidelines for writing constructive and respectful reviews that foster learning and scientific advancement without discouraging authors.
View article: An Evaluation of Covariance and Correlation Analysis in Entropy Method
An Evaluation of Covariance and Correlation Analysis in Entropy Method Open
<h2>Abstract</h2>\n<p><strong>Objectives:</strong> The main aim of this research is to obtain the criterion weight in Multi-Criteria Decision Making (MCDM) with conflicting criteria, as the relevance and …
View article: Chasing Interannual Marine Paleovariability
Chasing Interannual Marine Paleovariability Open
Several modes of tropical sea‐surface temperature (SST) variability operate on year‐to‐year (interannual) timescales and profoundly shape seasonal precipitation patterns across adjacent landmasses. Substantial uncertainty remains in addres…
View article: Climate Evolution Through the Onset and Intensification of Northern Hemisphere Glaciation
Climate Evolution Through the Onset and Intensification of Northern Hemisphere Glaciation Open
The Pliocene Epoch (∼5.3–2.6 million years ago, Ma) was characterized by a warmer than present climate with smaller Northern Hemisphere ice sheets, and offers an example of a climate system in long‐term equilibrium with current or predicte…
View article: Hydrologic Controls on Individual Ostracode Stable Isotopes in a Desert Lake: A Modern Baseline for Lake Turkana
Hydrologic Controls on Individual Ostracode Stable Isotopes in a Desert Lake: A Modern Baseline for Lake Turkana Open
Stable carbon (δ 13 C) and oxygen (δ 18 O) isotope measurements in lacustrine ostracodes are widely used as paleolimnological indicators of past climate change. Previous work has used individual ostracode valves to resolve seasonal and sub…
View article: Individual ostracode valve analyses (IOVA) of Sclerocypris clavularis from modern Lake Turkana sediments
Individual ostracode valve analyses (IOVA) of Sclerocypris clavularis from modern Lake Turkana sediments Open
We provide stable carbon (δ¹³C) and oxygen (δ¹⁸O) isotope measurements in individual calcitic valves of extant ostracode species, Sclerocypris clavularis, from modern sediments in 17 sites across Lake Turkana, eastern Africa. These sedimen…
View article: Individual ostracode valve analyses (IOVA) of Sclerocypris clavularis from modern Lake Turkana sediments
Individual ostracode valve analyses (IOVA) of Sclerocypris clavularis from modern Lake Turkana sediments Open
We provide stable carbon (δ¹³C) and oxygen (δ¹⁸O) isotope measurements in individual calcitic valves of extant ostracode species, Sclerocypris clavularis, from modern sediments in 17 sites across Lake Turkana, eastern Africa. These sedimen…
View article: Indian Ocean variability changes in the Paleoclimate Modelling Intercomparison Project
Indian Ocean variability changes in the Paleoclimate Modelling Intercomparison Project Open
The Indian Ocean exhibits multiple modes of interannual climate variability, whose future behaviour is uncertain. Recent analysis of glacial climates has uncovered an additional El Niño-like equatorial mode in the Indian Ocean, which could…
View article: Indian margin methane hydrate dissociation recorded in the carbon isotopes of benthic (Miliolida) foraminifera
Indian margin methane hydrate dissociation recorded in the carbon isotopes of benthic (Miliolida) foraminifera Open
Methane hydrates in ocean sediments have been investigated across various timescales using a broad array of indicators to better understand hydrate dynamics and climate linkages. Here we report individual benthic and planktonic foraminifer…
View article: Comment on egusphere-2022-1102
Comment on egusphere-2022-1102 Open
Abstract. The Indian Ocean exhibits multiple modes of interannual climate variability, whose future behaviour is uncertain. Recent analysis of glacial climates has uncovered an additional El Niño-like equatorial mode in th…
View article: Comment on egusphere-2022-1212
Comment on egusphere-2022-1212 Open
Abstract. The oxygen isotopic composition of benthic foraminiferal tests (δ18Ob) is one of the preeminent tools for correlating marine sediments and interpreting past terrestrial ice volume a…
View article: The PhanSST global database of Phanerozoic sea surface temperature proxy data
The PhanSST global database of Phanerozoic sea surface temperature proxy data Open