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  Subjects -> METEOROLOGY (Total: 106 journals)
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Climate of the Past (CP)
Journal Prestige (SJR): 1.981
Citation Impact (citeScore): 3
Number of Followers: 8  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1814-9324 - ISSN (Online) 1814-9332
Published by European Geosciences Union Homepage  [1 journal]
  • Bayesian multi-proxy reconstruction of early Eocene latitudinal
           temperature gradients

    • Abstract: Bayesian multi-proxy reconstruction of early Eocene latitudinal temperature gradients
      Kilian Eichenseer and Lewis A. Jones
      Clim. Past, 20, 349–362, https://doi.org/10.5194/cp-20-349-2024, 2024
      Large-scale palaeoclimate reconstructions are often based on sparse and unevenly sampled records, inviting potential biases. Here, we present a Bayesian hierarchical model that combines geochemical with ecological proxy data to model the latitudinal sea surface temperature gradient. Applying this model to the early Eocene climatic optimum highlights how our integrated approach can improve palaeoclimate reconstructions from datasets with limited sampling.
      PubDate: Wed, 21 Feb 2024 15:14:46 +010
      DOI: 10.5194/cp-20-349-2024 2024

       
  • Modeling Mediterranean ocean biogeochemistry of the Last Glacial Maximum

    • Abstract: Modeling Mediterranean ocean biogeochemistry of the Last Glacial Maximum
      Katharina D. Six, Uwe Mikolajewicz, and Gerhard Schmiedl
      Clim. Past Discuss., https//doi.org/10.5194/cp-2024-9,2024
      Preprint under review for CP (discussion: open, 0 comments)
      We use a comprehensive ocean model of the Mediterranean Sea to obtain the first consistent patterns of the physical-biogeochemical states for the Last Glacial Maximum (LGM) and today. Circulation changes due to low sea level during the LGM lead to reduced net primary production, but cold temperatures depress bacterial activity, resulting in an increased flux of organic matter to the seafloor. We also discuss potential biases that occur when climate signals are collected in organic material.
      PubDate: Wed, 21 Feb 2024 15:14:46 +010
      DOI: 10.5194/cp-2024-92024

       
  • Holocene land cover change in North America: continental trends, regional
           drivers, and implications for vegetation-atmosphere feedbacks

    • Abstract: Holocene land cover change in North America: continental trends, regional drivers, and implications for vegetation-atmosphere feedbacks
      Andria Dawson, John W. Williams, Marie-José Gaillard, Simon J. Goring, Behnaz Pirzamanbein, Johan Lindstrom, R. Scott Anderson, Andrea Brunelle, David Foster, Konrad Gajewski, Dan G. Gavin, Terri Lacourse, Thomas A. Minckley, Wyatt Oswald, Bryan Shuman, and Cathy Whitlock
      Clim. Past Discuss., https//doi.org/10.5194/cp-2024-6,2024
      Preprint under review for CP (discussion: open, 0 comments)
      Holocene vegetation-atmosphere interactions provide insight into intensifying land use impacts and the Holocene Conundrum- a mismatch between data- and model- inferred temperature. Using pollen records and statistical modeling, we reconstruct Holocene land cover for North America. We determine patterns and magnitudes of land cover changes across scales. We attribute land cover changes to ecological, climatic, and human drivers. These reconstructions provide benchmarks for Earth System Models.
      PubDate: Tue, 20 Feb 2024 15:14:46 +010
      DOI: 10.5194/cp-2024-62024

       
  • BrGDGT-based seasonal paleotemperature reconstruction for the last
           15‚ÄČ000 years from a shallow lake on the eastern Tibetan Plateau

    • Abstract: BrGDGT-based seasonal paleotemperature reconstruction for the last 15 000 years from a shallow lake on the eastern Tibetan Plateau
      Xiaohuan Hou, Nannan Wang, Zhe Sun, Kan Yuan, Xianyong Cao, and Juzhi Hou
      Clim. Past, 20, 335–348, https://doi.org/10.5194/cp-20-335-2024, 2024
      We present an ice-free season temperature based on brGDGTs over last 15 kyr on the eastern Tibetan Plateau (TP). The result shows that Holocene Thermal Maximum occurred during 8–3.5 ka, which lags behind pollen-based temperature recorded in same core, indicating a significant seasonal bias between different proxies. We also investigated previously published brGDGT-based temperatures on the TP to determine the pattern of Holocene temperature changes and possible reasons for the diverse records.
      PubDate: Tue, 13 Feb 2024 00:41:02 +010
      DOI: 10.5194/cp-20-335-2024 2024

       
  • Contrasting the Penultimate and Last Glacial Maxima (140 and 21 ka BP)
           using coupled climate-ice sheet modelling

    • Abstract: Contrasting the Penultimate and Last Glacial Maxima (140 and 21 ka BP) using coupled climate-ice sheet modelling
      Violet L. Patterson, Lauren J. Gregoire, Ruza Ivanovic, Niall Gandy, Jonathan Owen, Robin S. Smith, Oliver G. Pollard, and Lachlan C. Astfalck
      Clim. Past Discuss., https//doi.org/10.5194/cp-2024-10,2024
      Preprint under review for CP (discussion: open, 0 comments)
      Simulations of the last two glacial periods are run using a computer model in which the atmosphere and ice sheets interact. The results show that the initial conditions used in the simulations are the primary reason for the difference in simulated North American ice sheet volume between each period. Thus, the climate leading up to the glacial maxima and other factors, such as vegetation, are important contributors to the differences in the ice sheets at the Last and Penultimate Glacial Maxima.
      PubDate: Mon, 12 Feb 2024 22:19:03 +010
      DOI: 10.5194/cp-2024-102024

       
  • An 1200-year multi-proxy dendrochronological temperature reconstruction
           for the area of Austrian Alps

    • Abstract: An 1200-year multi-proxy dendrochronological temperature reconstruction for the area of Austrian Alps
      Marzena Kłusek, Michael Grabner, Sławomira Pawełczyk, and Jacek Pawlyta
      Clim. Past Discuss., https//doi.org/10.5194/cp-2024-4,2024
      Preprint under review for CP (discussion: open, 0 comments)
      This article presents a long time scale temperature reconstructions for the area of Schwarzensee Lake (Austria). The reconstruction was carried out with an annual resolution with application of subfossil wood and living trees. On the basis of measurements of growth-ring width, maximum latewood density and stable carbon and oxygen isotopes content within individual growth-rings, it was possible to precisely reconstruct temperature of the growing season (May–September) over the years 800–2000 CE.
      PubDate: Mon, 12 Feb 2024 22:19:03 +010
      DOI: 10.5194/cp-2024-42024

       
  • State-dependent impact of major volcanic eruptions observed in ice-core
           records of the last glacial period

    • Abstract: State-dependent impact of major volcanic eruptions observed in ice-core records of the last glacial period
      Johannes Lohmann, Jiamei Lin, Bo M. Vinther, Sune O. Rasmussen, and Anders Svensson
      Clim. Past, 20, 313–333, https://doi.org/10.5194/cp-20-313-2024, 2024
      We present the first attempt to constrain the climatic impact of volcanic eruptions with return periods of hundreds of years by the oxygen isotope records of Greenland and Antarctic ice cores covering the last glacial period. A clear multi-annual volcanic cooling signal is seen, but its absolute magnitude is subject to the unknown glacial sensitivity of the proxy. Different proxy signals after eruptions during cooler versus warmer glacial stages may reflect a state-dependent climate response.
      PubDate: Fri, 09 Feb 2024 23:28:05 +010
      DOI: 10.5194/cp-20-313-2024 2024

       
  • Effective diffusivity of sulfuric acid in Antarctic ice cores

    • Abstract: Effective diffusivity of sulfuric acid in Antarctic ice cores
      Tyler J. Fudge, Raphael Sauvage, Linh Vu, Benjamin H. Hills, Mirko Severi, and Edwin D. Waddington
      Clim. Past, 20, 297–312, https://doi.org/10.5194/cp-20-297-2024, 2024
      We use the oldest Antarctic ice core to estimate the rate of diffusion of sulfuric acid. Sulfuric acid is a marker of past volcanic activity and is critical in developing ice core timescales. The rate of diffusion is uncertain and is important to know, both for selecting future ice core locations and interpreting ice core records. We find the effective diffusivity of sulfate is 10 times smaller than previously estimated, indicating that the sulfuric acid signals will persist for longer.
      PubDate: Thu, 08 Feb 2024 23:28:05 +010
      DOI: 10.5194/cp-20-297-2024 2024

       
  • Uncertainties originating from GCM downscaling and bias correction with
           application to the MIS-11c Greenland Ice Sheet

    • Abstract: Uncertainties originating from GCM downscaling and bias correction with application to the MIS-11c Greenland Ice Sheet
      Brian R. Crow, Lev Tarasov, Michael Schulz, and Matthias Prange
      Clim. Past, 20, 281–296, https://doi.org/10.5194/cp-20-281-2024, 2024
      An abnormally warm period around 400,000 years ago is thought to have resulted in a large melt event for the Greenland Ice Sheet. Using a sequence of climate model simulations connected to an ice model, we estimate a 50 % melt of Greenland compared to today. Importantly, we explore how the exact methodology of connecting the temperatures and precipitation from the climate model to the ice sheet model can influence these results and show that common methods could introduce errors.
      PubDate: Tue, 06 Feb 2024 00:44:16 +010
      DOI: 10.5194/cp-20-281-2024 2024

       
  • Changes in the Red Sea overturning circulation during Marine Isotope
           Stage 3

    • Abstract: Changes in the Red Sea overturning circulation during Marine Isotope Stage 3
      Raphaël Hubert-Huard, Nils Andersen, Helge W. Arz, Werner Ehrmann, and Gerhard Schmiedl
      Clim. Past, 20, 267–280, https://doi.org/10.5194/cp-20-267-2024, 2024
      We have studied the geochemistry of benthic foraminifera (micro-fossils) from a sediment core from the Red Sea. Our data show that the circulation and carbon cycling of the Red Sea during the last glacial period responded to high-latitude millennial-scale climate variability and to the orbital influence of the African–Indian monsoon system. This implies a sensitive response of the Red Sea to climate changes.
      PubDate: Fri, 02 Feb 2024 17:21:00 +010
      DOI: 10.5194/cp-20-267-2024 2024

       
  • Miocene Antarctic Ice Sheet area adapts significantly faster than volume
           to CO2-induced climate change

    • Abstract: Miocene Antarctic Ice Sheet area adapts significantly faster than volume to CO2-induced climate change
      Lennert B. Stap, Constantijn J. Berends, and Roderik S. W. van de Wal
      Clim. Past, 20, 257–266, https://doi.org/10.5194/cp-20-257-2024, 2024
      Analysing simulations of Antarctic Ice Sheet variability during the early and mid-Miocene (23 to 14 Myr ago), we find that the ice sheet area adapts faster and more strongly than volume to climate change on quasi-orbital timescales. Considering the recent discovery that ice area, rather than volume, influences deep-ocean temperatures, this implies that the Miocene Antarctic Ice Sheet affects deep-ocean temperatures more than its volume suggests.
      PubDate: Tue, 30 Jan 2024 17:21:00 +010
      DOI: 10.5194/cp-20-257-2024 2024

       
  • Accumulation rates over the past 260 years archived in Elbrus ice
           core, Caucasus

    • Abstract: Accumulation rates over the past 260 years archived in Elbrus ice core, Caucasus
      Vladimir Mikhalenko, Stanislav Kutuzov, Pavel Toropov, Michel Legrand, Sergey Sokratov, Gleb Chernyakov, Ivan Lavrentiev, Susanne Preunkert, Anna Kozachek, Mstislav Vorobiev, Aleksandra Khairedinova, and Vladimir Lipenkov
      Clim. Past, 20, 237–255, https://doi.org/10.5194/cp-20-237-2024, 2024
      In this paper, we present a reconstruction of snow accumulation for both summer and winter over the past 260 years using ice-core records obtained from Mt. Elbrus in the Caucasus region. The accumulation record represents the historical precipitation patterns in a vast region encompassing the northern Caucasus, Black Sea, and southeastern Europe. Our findings show that the North Atlantic plays a crucial role in determining precipitation levels in this region.
      PubDate: Tue, 30 Jan 2024 17:21:00 +010
      DOI: 10.5194/cp-20-237-2024 2024

       
  • The Southern Ocean marine ice record of the early historical,
           circum-Antarctic voyages of Cook and Bellingshausen

    • Abstract: The Southern Ocean marine ice record of the early historical, circum-Antarctic voyages of Cook and Bellingshausen
      Grant Robert Bigg
      Clim. Past Discuss., https//doi.org/10.5194/cp-2024-5,2024
      Preprint under review for CP (discussion: open, 0 comments)
      The voyages of Cook (1772–1775) and Bellingshausen (1819–1821) were attempts to find a southern land mass. Sea-ice blocked each voyages’ southern probes, but sea-ice and iceberg records were collected from around Antarctica. They show more northerly records of both forms of marine ice than today. The early Pacific sector of the Southern Ocean saw marine ice within the range of modern observations, but the Weddell Sea and Indian Ocean marine ice then extended further north than today.
      PubDate: Tue, 30 Jan 2024 17:21:00 +010
      DOI: 10.5194/cp-2024-52024

       
  • Multi-centuries mean summer temperature variations in the Southern
           Rhaetian Alps reconstructed from Larix decidua blue-intensity data

    • Abstract: Multi-centuries mean summer temperature variations in the Southern Rhaetian Alps reconstructed from Larix decidua blue-intensity data
      Riccardo Cerrato, Maria Cristina Salvatore, Michele Brunetti, Andrea Somma, and Carlo Baroni
      Clim. Past Discuss., https//doi.org/10.5194/cp-2023-104,2024
      Preprint under review for CP (discussion: open, 0 comments)
      Historical climatological data extending beyond instrumental records are needed. Blue intensity data (BI) from Southern Rhaetian Alps European larches enhances the strength of dendroclimatology in reconstructing past climate at high resolution and results a better proxy than total ring width data. BI processing permits to reconstruct summer temperatures on a regional scale, and also contribute to extend the reconstruction to the Mediterranean basin and northern Europe with excellent correlation.
      PubDate: Mon, 29 Jan 2024 17:21:00 +010
      DOI: 10.5194/cp-2023-1042024

       
  • Process, spatial pattern and impacts of 1743 Extreme heat: From the
           perspective of historical documents

    • Abstract: Process, spatial pattern and impacts of 1743 Extreme heat: From the perspective of historical documents
      Le Tao, Yun Su, Xudong Chen, and Fangyu Tian
      Clim. Past Discuss., https//doi.org/10.5194/cp-2024-3,2024
      Preprint under review for CP (discussion: open, 0 comments)
      Our study collected 63 historical documents about 1743 extreme heat from 3 kinds of historical materials. By methods of text analysis such as keywords extraction, grading and classification, the extreme heat in 1743 was recovered. The advances of this study are that: details of the process of heat wave development over time are given, spatially severe regions are identified, and the spatial and temporal characteristics of the impacts of extreme heat are discerned.
      PubDate: Thu, 25 Jan 2024 03:47:13 +010
      DOI: 10.5194/cp-2024-32024

       
  • Surface mass balance and climate of the Last Glacial Maximum Northern
           Hemisphere ice sheets: simulations with CESM2.1

    • Abstract: Surface mass balance and climate of the Last Glacial Maximum Northern Hemisphere ice sheets: simulations with CESM2.1
      Sarah L. Bradley, Raymond Sellevold, Michele Petrini, Miren Vizcaino, Sotiria Georgiou, Jiang Zhu, Bette L. Otto-Bliesner, and Marcus Lofverstrom
      Clim. Past, 20, 211–235, https://doi.org/10.5194/cp-20-211-2024, 2024
      The Last Glacial Maximum (LGM) was the most recent period with large ice sheets in Europe and North America. We provide a detailed analysis of surface mass and energy components for two time periods that bracket the LGM: 26 and 21 ka BP. We use an earth system model which has been adopted for modern ice sheets. We find that all Northern Hemisphere ice sheets have a positive surface mass balance apart from the British and Irish ice sheets and the North American ice sheet complex.
      PubDate: Wed, 24 Jan 2024 03:47:13 +010
      DOI: 10.5194/cp-20-211-2024 2024

       
  • Relative importance of the mechanisms triggering the Eurasian ice sheet
           deglaciation in the GRISLI2.0 ice sheet model

    • Abstract: Relative importance of the mechanisms triggering the Eurasian ice sheet deglaciation in the GRISLI2.0 ice sheet model
      Victor van Aalderen, Sylvie Charbit, Christophe Dumas, and Aurélien Quiquet
      Clim. Past, 20, 187–209, https://doi.org/10.5194/cp-20-187-2024, 2024
      We present idealized numerical experiments to test the main mechanisms that triggered the deglaciation of the past Eurasian ice sheet. Simulations were performed with the GRISLI2.0 ice sheet model. The results indicate that the Eurasian ice sheet was primarily driven by surface melting, due to increased atmospheric temperatures. Basal melting below the ice shelves is only a significant driver if ocean temperatures increase by nearly 10 °C, in contrast with the findings of previous studies.
      PubDate: Thu, 18 Jan 2024 02:37:10 +010
      DOI: 10.5194/cp-20-187-2024 2024

       
  • Toward generalized Milankovitch theory (GMT)

    • Abstract: Toward generalized Milankovitch theory (GMT)
      Andrey Ganopolski
      Clim. Past, 20, 151–185, https://doi.org/10.5194/cp-20-151-2024, 2024
      Despite significant progress in modelling Quaternary climate dynamics, a comprehensive theory of glacial cycles is still lacking. Here, using the results of model simulations and data analysis, I present a framework of the generalized Milankovitch theory (GMT), which further advances the concept proposed by Milutin Milankovitch over a century ago. The theory explains a number of facts which were not known during Milankovitch time's, such as the 100 kyr periodicity of the late Quaternary.
      PubDate: Thu, 18 Jan 2024 02:37:10 +010
      DOI: 10.5194/cp-20-151-2024 2024

       
  • Climate and disease in historical urban space: evidence from 19th century
           Poznań, Poland

    • Abstract: Climate and disease in historical urban space: evidence from 19th century Poznań, Poland
      Grażyna Liczbińska, Jörg Peter Vögele, and Marek Brabec
      Clim. Past, 20, 137–150, https://doi.org/10.5194/cp-20-137-2024, 2024
      This study examines the relationship between temperature and precipitation as explanatory variables for the probability of death due to waterborne and airborne diseases in historical urban space. The lagged effects of temperature and precipitation on waterborne and airborne diseases were significant, except for the smooth lagged average monthly temperature effect for the latter. There was also significant spatial heterogeneity in the prevalence of deaths due to waterborne and airborne diseases.
      PubDate: Wed, 17 Jan 2024 02:37:10 +010
      DOI: 10.5194/cp-20-137-2024 2024

       
  • Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay

    • Abstract: Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay
      Eduardo Queiroz Alves, Wanyee Wong, Jens Hefter, Hendrik Grotheer, Tommaso Tesi, Torben Gentz, Karin Zonneveld, and Gesine Mollenhauer
      Clim. Past, 20, 121–136, https://doi.org/10.5194/cp-20-121-2024, 2024
      Our study reveals a previously unknown peat source for the massive influx of terrestrial organic matter that was exported from the European continent to the ocean during the last deglaciation. Our findings shed light on ancient terrestrial organic carbon mobilization, providing insights that are crucial for refining climate models.
      PubDate: Tue, 16 Jan 2024 02:37:10 +010
      DOI: 10.5194/cp-20-121-2024 2024

       
 
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