Last glacial millennial-scale hydro-climate and temperature changes in Puerto Rico constrained by speleothem fluid inclusion δ18O and δ2H values

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • Sophie F Warken
  • Therese Weissbach
  • Tobias Kluge
  • Hubert Vonhof
  • Denis Scholz
  • Rolf Vieten
  • Martina Schmidt
  • Amos Winter
  • Norbert Frank
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000751431000001&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.5194/cp-18-167-2022
eISSN
1814-9332
Externe Identifier
  • Clarivate Analytics Document Solution ID: YT5WY
ISSN
1814-9324
Ausgabe der Veröffentlichung
1
Zeitschrift
CLIMATE OF THE PAST
Paginierung
167 - 181
Datum der Veröffentlichung
2022
Status
Published
Titel
Last glacial millennial-scale hydro-climate and temperature changes in Puerto Rico constrained by speleothem fluid inclusion δ<SUP>18</SUP>O and δ<SUP>2</SUP>H values
Sub types
  • Article
Ausgabe der Zeitschrift
18

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Abstract
<jats:p>Abstract. We present speleothem fluid inclusion δ18Of and δ2Hf values from Larga Cave, Puerto Rico, that cover the interval between 46.2 and 15.3 ka on the millennial scale, including the Last Glacial Maximum (LGM) and several stadial and interstadial cycles. The data set can be divided in two main clusters of stable isotope compositions of the fluid inclusion water with respect to the global meteoric water line (GMWL), which coincide with strong variations in the water content of the stalagmite. In particular, this clustering is found to be climate related, where one cluster comprises samples from cold and dry periods, such as the Heinrich and Greenland stadials (HSs and GSs), as well as parts of the LGM, which exhibit very high δ18Of and δ2Hf values. We interpret this enrichment as being caused by evaporation inside the cave due to enhanced cave ventilation during these colder and drier times. In contrast, in most samples corresponding to warmer and wetter Greenland interstadials (GIs), but also for some from HS 2 and 3, the δ18Of and δ2Hf values plot on the meteoric water line and modification of fluid inclusion water due to “in-cave” evaporation are found to be negligible. Consequently, variations of recent glacial hydro-climate and temperatures in the western tropical Atlantic can be constrained. In general, δ18Of values from fluid inclusions are up to 3 ‰ higher than those of modern drip water, which is interpreted as a weaker atmospheric convective activity during the last glacial period. In addition, reconstructed temperatures suggest an average cooling of 2–3 ∘C during the LGM compared to modern cave temperatures. Reconstructed cave temperatures yield an average cooling of −1.4 ± 2.8 ∘C for HS 2 and −3.6 ± 2.2 ∘C for HS 3. Higher δ18Of values of these samples further suggest that the drip water was dominated by orographic rainfall and/or cold fronts, along with weak or even absent convective activity. In contrast, during interstadial phases, reconstructed temperatures reached nearly modern values, and convective activity was comparable to or only slightly weaker than today. </jats:p>
Autoren
  • Sophie F Warken
  • Therese Weißbach
  • Tobias Kluge
  • Hubert Vonhof
  • Denis Scholz
  • Rolf Vieten
  • Martina Schmidt
  • Amos Winter
  • Norbert Frank
DOI
10.5194/cp-18-167-2022
eISSN
1814-9332
Ausgabe der Veröffentlichung
1
Zeitschrift
Climate of the Past
Sprache
en
Online publication date
2022
Paginierung
167 - 181
Status
Published online
Herausgeber
Copernicus GmbH
Herausgeber URL
http://dx.doi.org/10.5194/cp-18-167-2022
Datum der Datenerfassung
2022
Titel
Last glacial millennial-scale hydro-climate and temperature changes in Puerto Rico constrained by speleothem fluid inclusion &amp;lt;i&amp;gt;δ&amp;lt;/i&amp;gt;&amp;lt;sup&amp;gt;18&amp;lt;/sup&amp;gt;O and &amp;lt;i&amp;gt;δ&amp;lt;/i&amp;gt;&amp;lt;sup&amp;gt;2&amp;lt;/sup&amp;gt;H values
Ausgabe der Zeitschrift
18

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