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Middle Miocene Climate and Stable Oxygen Isotopes in Europe Based on Numerical Modeling (2022)

Botsyun, Svetlana ; Ehlers, Todd A. ; Koptev, Alexander ; [weitere]

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Publikationsdatum: 2023-11-24

Beschreibung: The Middle Miocene (15.99–11.65 Ma) of Europe witnessed major climatic, environmental, and vegetational change, yet we are lacking detailed reconstructions of Middle Miocene temperature and precipitation patterns over Europe. Here, we use a high‐resolution (∼0.75°) isotope‐enabled general circulation model (ECHAM5‐wiso) with time‐specific boundary conditions to investigate changes in temperature, precipitation, and δ〈sup〉18〈/sup〉O in precipitation (δ〈sup〉18〈/sup〉O〈sub〉p〈/sub〉). Experiments were designed with variable elevation configurations of the European Alps and different atmospheric CO〈sub〉2〈/sub〉 levels to examine the influence of Alpine elevation and global climate forcing on regional climate and δ〈sup〉18〈/sup〉Op patterns. Modeling results are in agreement with available paleobotanical temperature data and with low‐resolution Middle Miocene experiments of the Miocene Model Intercomparison Project (MioMIP1). However, simulated precipitation rates are 300–500 mm/yr lower in the Middle Miocene than for pre‐industrial times for central Europe. This result is consistent with precipitation estimates from herpetological fossil assemblages, but contradicts precipitation estimates from paleobotanical data. We attribute the Middle Miocene precipitation change in Europe to shifts in large‐scale pressure patterns in the North Atlantic and over Europe and associated changes in wind direction and humidity. We suggest that global climate forcing contributed to a maximum δ〈sup〉18〈/sup〉O〈sub〉p〈/sub〉 change of ∼2‰ over high elevation (Alps) and ∼1‰ over low elevation regions. In contrast, we observe a maximum modeled δ〈sup〉18〈/sup〉O〈sub〉p〈/sub〉 decrease of 8‰ across the Alpine orogen due to Alpine topography. However, the elevation‐δ〈sup〉18〈/sup〉O〈sub〉p〈/sub〉 lapse rate shallows in the Middle Miocene, leading to a possible underestimation of paleotopography when using present‐day δ〈sup〉18〈/sup〉O〈sub〉p〈/sub〉—elevation relationships data for stable isotope paleoaltimetry studies.

Beschreibung: Key Points: A high‐resolution isotope‐enabled general circulation model is used to explore Middle Miocene climate and precipitation δ〈sup〉18〈/sup〉O across Europe. Middle Miocene bi‐directional precipitation change consistent with herpetological fossils and account for precipitation δ〈sup〉18〈/sup〉O variations. Global Miocene climate forcing contributed a max δ〈sup〉18〈/sup〉O change of ∼2‰ over the high Alpine elevation and to ∼1‰ over low elevation.

Beschreibung: German research fondation

Beschreibung: Alexander‐von‐Humboldt foundation, Feodor‐Lynen‐Fellowship

Beschreibung: Alexander‐von‐Humboldt foundation, Humboldt Research Fellowship

Beschreibung: Scientific Steering Committee

Beschreibung: https://mpimet.mpg.de/fileadmin/projekte/ICON-ESM/mpi-m_sla_201202.pdf

Beschreibung: https://gitlab.awi.de/mwerner/mpi-esm-wiso

Beschreibung: https://zenodo.org/record/6308475#.Y0gmDSFS-2w

Schlagwort(e): ddc:550.724 ; Europe ; Middle Miocene ; climate modeling ; stable water isotopes ; temperature ; precipitation ; paleoclimate ; paleoelevation ; Alps

Sprache: Englisch

Materialart: doc-type:article

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Deuterium isotopic records in daily precipitation samples at site Lianhuasi, Southeastern Tibetan Plateau (2020)

Shi, Xiaoyi ; Risi, Camille ; Pu, Tao ; [weitere]

PANGAEA

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Publikationsdatum: 2023-01-13

Schlagwort(e): DATE/TIME; Lianhuasi; Tibetan Plateau; Water sample, rain; WSR; δ Deuterium, precipitation

Materialart: Dataset

Format: text/tab-separated-values, 101 data points

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Deuterium isotopic records in daily precipitation samples at site Taizimiao, Southeastern Tibetan Plateau (2020)

Shi, Xiaoyi ; Risi, Camille ; Pu, Tao ; [weitere]

PANGAEA

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Publikationsdatum: 2023-01-13

Schlagwort(e): DATE/TIME; Taizimiao; Tibetan Plateau; Water sample, rain; WSR; δ Deuterium, precipitation

Materialart: Dataset

Format: text/tab-separated-values, 72 data points

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Deuterium isotopic records in daily precipitation samples at site Lijiang, Southeastern Tibetan Plateau (2020)

Shi, Xiaoyi ; Risi, Camille ; Pu, Tao ; [weitere]

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Publikationsdatum: 2023-01-13

Schlagwort(e): DATE/TIME; Lijiang; Tibetan Plateau; Water sample, rain; WSR; δ Deuterium, precipitation

Materialart: Dataset

Format: text/tab-separated-values, 115 data points

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Deuterium isotopic records in daily precipitation samples at site Mingyong, Southeastern Tibetan Plateau (2020)

Shi, Xiaoyi ; Risi, Camille ; Pu, Tao ; [weitere]

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Publikationsdatum: 2023-01-13

Schlagwort(e): DATE/TIME; Mingyong; Tibetan Plateau; Water sample, rain; WSR; δ Deuterium, precipitation

Materialart: Dataset

Format: text/tab-separated-values, 57 data points

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Stable isotopes of precipitation at Concordia Station, East Antarctica, 2007-2014 (2021)

Stenni, Barbara ; Scarchilli, Claudio ; Masson-Delmotte, Valerie ; [weitere]

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Publikationsdatum: 2023-01-13

Schlagwort(e): DATE/TIME; Deuterium excess; Dome C; DomeC_PrecPREREC; Dome C, Antarctica; Infrared spectrometer Picarro L2130, L2140; Water sample, precipitation; WSP; δ18O, water

Materialart: Dataset

Format: text/tab-separated-values, 1618 data points

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Daily precipitation δD records at 4 sites in Mount Yulong and Mount Meili regions of Southeastern Tibetan Plateau (2020)

Shi, Xiaoyi ; Risi, Camille ; Pu, Tao ; [weitere]

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Publikationsdatum: 2023-01-30

Beschreibung: Daily precipitation samples were collected at 4 sites in Mount Yulong and Mount Meili regions of Southeastern Tibetan Plateau and analyzed for isotopic composition. We share here the deltaD observations, and some ancillary data useful to interpret the isotopic observations (meteorological observations, simulation with the isotope-enabled general circulation model, remote-sensing water vapor deltaD observations by IASI).

Schlagwort(e): precipitation isotopes; Tibetan Plateau

Materialart: Dataset

Format: application/zip, 7 datasets

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Isotope-enabled large-eddy simulation outputs (2020)

Risi, Camille ; Muller, Caroline ; Blossey, Peter

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Publikationsdatum: 2023-01-30

Beschreibung: This dataset includes the outputs from 11 isotope-enabled large-eddy simulations. Simulations are done with the System for Atmospheric Modeling (SAM) non-hydrostatic model. The control simulation ("ctrl") is three-dimensional, with a doubly-periodic domain of 96 km x 96 km. The horizontal resolution is 750 m. There are 96 vertical levels. The simulation is run in radiative-convective equilibrium over an ocean surface with a sea surface temperature (SST) of 30°C. In two other simulations, the imposed SST is varied (26°C, 33°C): "26C" and "33C". In five other simulations, a large-scale vertical velocity forcing is imposed: - large-scale vertical velocity of -60hPa/d peaking at 500hPa: "omegaLSm60" - large-scale vertical velocity of -20hPa/d peaking at 500hPa: "omegaLSm20" - large-scale vertical velocity of +20hPa/d peaking at 500hPa: "omegaLS20" - large-scale vertical velocity of -60hPa/d peaking at 400hPa: "p400" - large-scale vertical velocity of -60hPa/d peaking at 600hPa: "p600" A simulation similar to "ctrl" is run with a horizontal resolution of 200m over a domain of 25.6 x 25.6km: "200m". Two simulations are similar to "ctrl" and "omegaLSm60" but without isotopic fractionation during rain evaporation: "ctrl_nofracrev" and "omegaLSm60_nofracrev". Outputs for simulations used in Risi et al 2020 include 1D variables and 3 variables in the lower troposphere. Outputs for simulations in Risi et al 2021 include 3D variables covering the full troposphere.

Schlagwort(e): File content; File format; File name; File size; large-eddy simulation; Uniform resource locator/link to file; water isotopes

Materialart: Dataset

Format: text/tab-separated-values, 115 data points

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Daily meteorological observations at site Lijiang, Southeastern Tibetan Plateau (2020)

Shi, Xiaoyi ; Risi, Camille ; Pu, Tao ; [weitere]

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Publikationsdatum: 2023-06-19

Schlagwort(e): DATE/TIME; HEIGHT above ground; Humidity, relative, daily mean; Lijiang; Precipitation, daily total; Temperature, air, daily mean; Tibetan Plateau; Water sample, rain; Wind direction description; WSR

Materialart: Dataset

Format: text/tab-separated-values, 304 data points

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Stable isotope record from snow pit ITASE_S2 (2017)

Touzeau, Alexandra ; Landais, Amaëlle ; Stenni, Barbara ; [weitere]

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Publikationsdatum: 2023-07-19

Schlagwort(e): DEPTH, ice/snow; East Antarctica; ITASE_S2; SNOWPIT; Snow pit; δ18O, water; δ Deuterium, water

Materialart: Dataset

Format: text/tab-separated-values, 204 data points

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