Assessing Seasonal and Inter‐Annual Marine Sediment Climate Proxy Data.

Hathorne, Ed C. , Dolman, Andrew M. and Laepple, Thomas (2023) Assessing Seasonal and Inter‐Annual Marine Sediment Climate Proxy Data. Open Access Paleoceanography and Paleoclimatology, 38 (10). Art.Nr. e2023PA004649. DOI 10.1029/2023PA004649.

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Supplementary data:

Abstract

Key Points:
- Novel micro-analytical techniques allow seasonally resolved climate proxy data from varved marine sediments
- Potential to generate seasonal and inter annual resolution sea surface temperature proxy time series spanning >1,000 years
- Thorough assessment of processes that influence the climate signal recovered from proxies, validated with careful replication, is required

Three recently published papers including Napier et al. (2022, https://doi.org/10.1029/2021PA004355) utilize novel microanalytical approaches with varved marine sediments to demonstrate the potential to reconstruct seasonal and inter-annual climate variability. Obtaining paleoclimate data at a resolution akin to the observational record is vitally important for improving our understanding of climate phenomena such as monsoons and modes of variability such as the El Niño Southern Oscillation, for which appraisals of past inter-annual variability is critical. The ability to generate seasonal and inter annual resolution sea surface temperature proxy time series spanning a thousand years or more is revolutionary and has the potential to fill gaps in our knowledge of climate variability. Although generally limited to sediments from regions with oxygen depleted bottom waters, there is great potential to integrate shorter seasonal resolution climate “snap shots” from other archives such as annually banded corals into composite time series. But as paleoceanographic data are used more by the observational and modeling fields, we make the case for conducting a thorough case-by-case assessment of the processes that influence the climate signal recovered from proxies, using careful replication to validate new approaches. Understanding or exploring the potential influence of processes which effectively filter the climate signal will lead to more quantitative paleoceanographic data that will better serve the broader climate science community.

Document Type: Article
Funder compliance: info:eu-repo/grantAgreement/EC/H2020/716092; BMBF: 01LP1509C
Keywords: timescale-dependent uncertainty;temperature variability; rainfall; paleoclimate records; surface temperature; Pacific; ENSO
Research affiliation: MARUM
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
HGF-AWI
Main POF Topic: PT2: Ocean and Cryosphere
Refereed: Yes
Open Access Journal?: No
Publisher: AGU (American Geophysical Union), Wiley
Related URLs:
Projects: PalMod
Date Deposited: 26 Oct 2023 07:29
Last Modified: 07 Feb 2024 15:51
URI: https://oceanrep.geomar.de/id/eprint/59275

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