Clues from the Sea Paint a Picture of Earth’s Water Cycle

DeLong, Kristine L.; Atwood, Alyssa R.; Moore, Anne; Sánchez, Sara Iglesias

doi:10.1029/2022eo220231

Cited by 4 publications

(1 citation statement)

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“…The resulting δ 18 O sw data from the last several decades has provided a useful temporal average of spatial δ 18 O sw variability across the global ocean (Figure 1a), but typically cannot define even seasonal δ 18 O sw variability. Few continuous time series of δ 18 O sw from single locations exist, given the challenges in maintaining such seawater collections over long periods of time (Conroy et al., 2017; DeLong et al., 2022). Thus, we still have little idea of how δ 18 O sw varies seasonally and interannually, with our current understanding coming mainly from isotope‐enabled ocean model simulations.…”

Section: Introductionmentioning

confidence: 99%

Equatorial Undercurrent Influence on Surface Seawater δ¹⁸O Values in the Galápagos

Conroy

Murray

Patterson

et al. 2023

Geophysical Research Letters

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Section: Introductionmentioning

confidence: 99%

Equatorial Undercurrent Influence on Surface Seawater δ¹⁸O Values in the Galápagos

Conroy

Murray

Patterson

et al. 2023

Geophysical Research Letters

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Water isotopes, climate variability, and the hydrological cycle: recent advances and new frontiers

Dee

Bailey

Conroy

et al. 2023

Environ. Res.: Climate

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The hydrologic cycle is a fundamental component of the climate system with critical societal and ecological relevance. Yet gaps persist in our understanding of water fluxes and their response to increased greenhouse gas forcing. The stable isotope ratios of oxygen and hydrogen in water provide a unique opportunity to evaluate hydrological processes and investigate their role in the variability of the climate system and its sensitivity to change. Water isotopes also form the basis of many paleoclimate proxies in a variety of archives, including ice cores, lake and marine sediments, corals, and speleothems. These records hold most of the available information about past hydrologic variability prior to instrumental observations. Water isotopes thus provide a ‘common currency’ that links paleoclimate archives to modern observations, allowing us to evaluate hydrologic processes and their effects on climate variability on a wide range of time and length scales. Building on previous literature summarizing advancements in water isotopic measurements and modeling and describe water isotopic applications for understanding hydrological processes, this topical review reflects on new insights about climate variability from isotopic studies. Our intention is to highlight new work and opportunities to enhance our understanding and predictive skill, rather than be exhaustive. We offer a set of recommendations to advance observational and model-based tools for climate research, and highlight opportunities to better constrain climate sensitivity and identify anthropogenically-driven hydrologic changes within the inherently noisy background of natural climate variability.

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The CoralHydro2k database: a global, actively curated compilation of coral δ¹⁸O and Sr ∕ Ca proxy records of tropical ocean hydrology and temperature for the Common Era

Walter¹,

Sayani²,

Felis³

et al. 2023

Earth Syst. Sci. Data

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Abstract. The response of the hydrological cycle to anthropogenic climate change, especially across the tropical oceans, remains poorly understood due to the scarcity of long instrumental temperature and hydrological records. Massive shallow-water corals are ideally suited to reconstructing past oceanic variability as they are widely distributed across the tropics, rapidly deposit calcium carbonate skeletons that continuously record ambient environmental conditions, and can be sampled at monthly to annual resolution. Climate reconstructions based on corals primarily use the stable oxygen isotope composition (δ18O), which acts as a proxy for sea surface temperature (SST), and the oxygen isotope composition of seawater (δ18Osw), a measure of hydrological variability. Increasingly, coral δ18O time series are paired with time series of strontium-to-calcium ratios (Sr/Ca), a proxy for SST, from the same coral to quantify temperature and δ18Osw variability through time. To increase the utility of such reconstructions, we present the CoralHydro2k database, a compilation of published, peer-reviewed coral Sr/Ca and δ18O records from the Common Era (CE). The database contains 54 paired Sr/Ca–δ18O records and 125 unpaired Sr/Ca or δ18O records, with 88 % of these records providing data coverage from 1800 CE to the present. A quality-controlled set of metadata with standardized vocabulary and units accompanies each record, informing the use of the database. The CoralHydro2k database tracks large-scale temperature and hydrological variability. As such, it is well-suited for investigations of past climate variability, comparisons with climate model simulations including isotope-enabled models, and application in paleodata-assimilation projects. The CoralHydro2k database is available in Linked Paleo Data (LiPD) format with serializations in MATLAB, R, and Python and can be downloaded from the NOAA National Center for Environmental Information's Paleoclimate Data Archive at https://doi.org/10.25921/yp94-v135 (Walter et al., 2022).

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Clues from the Sea Paint a Picture of Earth’s Water Cycle

Abstract: New instrumentation and growing modeling needs in the Earth sciences are driving a renewed effort to compile and curate seawater oxygen isotope data in a centralized, accessible database.

Cited by 4 publications

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Equatorial Undercurrent Influence on Surface Seawater δ¹⁸O Values in the Galápagos

Equatorial Undercurrent Influence on Surface Seawater δ¹⁸O Values in the Galápagos

Water isotopes, climate variability, and the hydrological cycle: recent advances and new frontiers

The CoralHydro2k database: a global, actively curated compilation of coral δ¹⁸O and Sr ∕ Ca proxy records of tropical ocean hydrology and temperature for the Common Era

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Clues from the Sea Paint a Picture of Earth’s Water Cycle

Abstract: New instrumentation and growing modeling needs in the Earth sciences are driving a renewed effort to compile and curate seawater oxygen isotope data in a centralized, accessible database.

Cited by 4 publications

References 0 publications

Equatorial Undercurrent Influence on Surface Seawater δ18O Values in the Galápagos

Equatorial Undercurrent Influence on Surface Seawater δ18O Values in the Galápagos

Water isotopes, climate variability, and the hydrological cycle: recent advances and new frontiers

The CoralHydro2k database: a global, actively curated compilation of coral δ18O and Sr ∕ Ca proxy records of tropical ocean hydrology and temperature for the Common Era

Contact Info

Product

Resources

About

Equatorial Undercurrent Influence on Surface Seawater δ¹⁸O Values in the Galápagos

Equatorial Undercurrent Influence on Surface Seawater δ¹⁸O Values in the Galápagos

The CoralHydro2k database: a global, actively curated compilation of coral δ¹⁸O and Sr ∕ Ca proxy records of tropical ocean hydrology and temperature for the Common Era