 Subjects -> METEOROLOGY (Total: 106 journals)
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- Evaluating the 11-year solar cycle and short-term 10Be deposition events
with novel excess water samples from the East Greenland Ice-core Project
(EGRIP)
Abstract: Evaluating the 11-year solar cycle and short-term 10Be deposition events with novel excess water samples from the East Greenland Ice-core Project (EGRIP)
Chiara I. Paleari, Florian Mekhaldi, Tobias Erhardt, Minjie Zheng, Marcus Christl, Florian Adolphi, Maria Hörhold, and Raimund Muscheler
Clim. Past, 19, 2409–2422, https://doi.org/10.5194/cp-19-2409-2023, 2023
In this study, we test the use of excess meltwater from continuous flow analysis from a firn core from Greenland for the measurement of 10Be for solar activity reconstructions. We show that the quality of results is similar to the measurements on clean firn, which opens the possibility to obtain continuous 10Be records without requiring large amounts of clean ice. Furthermore, we investigate the possibility of identifying solar storm signals in 10Be records from Greenland and Antarctica.
PubDate: Wed, 22 Nov 2023 22:23:00 +010
DOI: 10.5194/cp-19-2409-2023 2023
- The climate in Poland (central Europe) in the first half of the last
millennium, revisited
Abstract: The climate in Poland (central Europe) in the first half of the last millennium, revisited
Rajmund Przybylak, Piotr Oliński, Marcin Koprowski, Elżbieta Szychowska-Krąpiec, Marek Krąpiec, Aleksandra Pospieszyńska, and Radosław Puchałka
Clim. Past, 19, 2389–2408, https://doi.org/10.5194/cp-19-2389-2023, 2023
The present paper upgrades our knowledge of Poland’s climate in the period 1001–1500 using multiproxy data. Four new climate reconstructions have been constructed – three based on dendrochronological data (since the 12th century) and one on documentary evidence (since the 15th century). The results should help improve the knowledge of climate change in Europe, particularly in central Europe.
PubDate: Tue, 21 Nov 2023 18:41:08 +010
DOI: 10.5194/cp-19-2389-2023 2023
- A series of climate oscillations around 8.2 ka BP revealed through
multi-proxy speleothem records from North China
Abstract: A series of climate oscillations around 8.2 ka BP revealed through multi-proxy speleothem records from North China
Pengzhen Duan, Hanying Li, Zhibang Ma, Jingyao Zhao, Xiyu Dong, Ashish Sinha, Peng Hu, Haiwei Zhang, Youfeng Ning, Guangyou Zhu, and Hai Cheng
Clim. Past Discuss., https//doi.org/10.5194/cp-2023-87,2023
Preprint under review for CP (discussion: open, 0 comments)
We use multiproxy speleothem records to manifest a two drought-one pluvial pattern during 8.5–8.0 ka BP. The different rebounded rainfall amount after two droughts causes different behavior of δ13C, suggesting the dominant role of rainfall threshold on the ecosystem. A comparison of different records suggests the prolonged 8.2 ka event is a globally common phenomenon rather than a regional signal. The variability of the AMOC strength is mainly responsible for these climate changes.
PubDate: Tue, 21 Nov 2023 18:41:08 +010
DOI: 10.5194/cp-2023-872023
- Model and proxy evidence for coordinated changes in the hydroclimate of
distant regions over the Last Millennium
Abstract: Model and proxy evidence for coordinated changes in the hydroclimate of distant regions over the Last Millennium
Pedro José Roldán-Gómez, Jesús Fidel González-Rouco, Jason E. Smerdon, and Félix García-Pereira
Clim. Past, 19, 2361–2387, https://doi.org/10.5194/cp-19-2361-2023, 2023
Analyses of reconstructed data suggest that the precipitation and availability of water have evolved in a similar way during the Last Millennium in different regions of the world, including areas of North America, Europe, the Middle East, southern Asia, northern South America, East Africa and the Indo-Pacific. To confirm this link between distant regions and to understand the reasons behind it, the information from different reconstructed and simulated products has been compiled and analyzed.
PubDate: Fri, 17 Nov 2023 18:41:08 +010
DOI: 10.5194/cp-19-2361-2023 2023
- Southern Hemisphere atmospheric history of carbon monoxide over the late
Holocene reconstructed from multiple Antarctic ice archives
Abstract: Southern Hemisphere atmospheric history of carbon monoxide over the late Holocene reconstructed from multiple Antarctic ice archives
Xavier Faïn, David M. Etheridge, Kévin Fourteau, Patricia Martinerie, Cathy M. Trudinger, Rachael H. Rhodes, Nathan J. Chellman, Ray L. Langenfelds, Joseph R. McConnell, Mark A. J. Curran, Edward J. Brook, Thomas Blunier, Grégory Teste, Roberto Grilli, Anthony Lemoine, William T. Sturges, Boris Vannière, Johannes Freitag, and Jérôme Chappellaz
Clim. Past, 19, 2287–2311, https://doi.org/10.5194/cp-19-2287-2023, 2023
We report on a 3000-year record of carbon monoxide (CO) levels in the Southern Hemisphere's high latitudes by combining ice core and firn air measurements with modern direct atmospheric samples. Antarctica [CO] remained stable (–835 to 1500 CE), decreased during the Little Ice Age, and peaked around 1985 CE. Such evolution reflects stable biomass burning CO emissions before industrialization, followed by growth from CO anthropogenic sources, which decline after 1985 due to improved combustion.
PubDate: Wed, 15 Nov 2023 17:42:38 +010
DOI: 10.5194/cp-19-2287-2023 2023
- Moss kill dates and modeled summer temperature track episodic snowline
lowering and ice cap expansion in Arctic Canada through the Common Era
Abstract: Moss kill dates and modeled summer temperature track episodic snowline lowering and ice cap expansion in Arctic Canada through the Common Era
Gifford H. Miller, Simon L. Pendleton, Alexandra Jahn, Yafang Zhong, John T. Andrews, Scott J. Lehman, Jason P. Briner, Jonathan H. Raberg, Helga Bueltmann, Martha Raynolds, Áslaug Geirsdóttir, and John R. Southon
Clim. Past, 19, 2341–2360, https://doi.org/10.5194/cp-19-2341-2023, 2023
Receding Arctic ice caps reveal moss killed by earlier ice expansions; 186 moss kill dates from 71 ice caps cluster at 250–450, 850–1000 and 1240–1500 CE and continued expanding 1500–1880 CE, as recorded by regions of sparse vegetation cover, when ice caps covered> 11 000 km2 but
PubDate: Wed, 15 Nov 2023 17:42:38 +010
DOI: 10.5194/cp-19-2341-2023 2023
- Response of Coastal California Hydroclimate to the Paleocene-Eocene
Thermal Maximum
Abstract: Response of Coastal California Hydroclimate to the Paleocene-Eocene Thermal Maximum
Xiaodong Zhang, Brett J. Tipple, Jiang Zhu, William D. Rush, Christian A. Shields, Joseph B. Novak, and James C. Zachos
Clim. Past Discuss., https//doi.org/10.5194/cp-2023-89,2023
Preprint under review for CP (discussion: open, 0 comments)
This study is motivated by the current anthropogenic warming forced transition in regional hydroclimate. We use observations and model simulations during PETM, an anomalous greenhouse global warming event in the past, to constrain regional/local hydroclimate response. Our findings based on multi-proxy evidence within the context of model output suggest a transition to an overall drier climate punctuated by increased precipitation during summer in coastal California during the PETM.
PubDate: Tue, 14 Nov 2023 17:42:38 +010
DOI: 10.5194/cp-2023-892023
- Biotic response of plankton communities to Middle to Late Miocene monsoon
wind and nutrient flux changes in the Oman margin upwelling zone
Abstract: Biotic response of plankton communities to Middle to Late Miocene monsoon wind and nutrient flux changes in the Oman margin upwelling zone
Gerald Auer, Or M. Bialik, Mary-Elizabeth Antoulas, Noam Vogt-Vincent, and Werner E. Piller
Clim. Past, 19, 2313–2340, https://doi.org/10.5194/cp-19-2313-2023, 2023
We provided novel insights into the behaviour of a major upwelling cell between 15 and 8.5 million years ago. To study changing conditions, we apply a combination of geochemical and paleoecological parameters to characterize the nutrient availability and subsequent utilization by planktonic primary producers. These changes we then juxtapose with established records of contemporary monsoon wind intensification and changing high-latitude processes to explain shifts in the plankton community.
PubDate: Mon, 13 Nov 2023 17:42:38 +010
DOI: 10.5194/cp-19-2313-2023 2023
- Precipitation reconstructions for Paris based on the observations by Louis
Morin, 1665–1713 CE
Abstract: Precipitation reconstructions for Paris based on the observations by Louis Morin, 1665–1713 CE
Thomas Pliemon, Ulrich Foelsche, Christian Rohr, and Christian Pfister
Clim. Past, 19, 2237–2256, https://doi.org/10.5194/cp-19-2237-2023, 2023
Louis Morin consistently recorded precipitation intensity and duration between 1665 and 1713. We use these records to reconstruct precipitation totals. This reconstruction is validated by several methods and then presented using precipitation indexes. What is exceptional about this dataset is the availability of a sub-daily resolution and the low number of missing data points over the entire observation period.
PubDate: Fri, 10 Nov 2023 14:54:02 +010
DOI: 10.5194/cp-19-2237-2023 2023
- The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework
and associated timescale for the European Project for Ice Coring in
Antarctica (EPICA) Dome C ice core
Abstract: The Antarctic Ice Core Chronology 2023 (AICC2023) chronological framework and associated timescale for the European Project for Ice Coring in Antarctica (EPICA) Dome C ice core
Marie Bouchet, Amaëlle Landais, Antoine Grisart, Frédéric Parrenin, Frédéric Prié, Roxanne Jacob, Elise Fourré, Emilie Capron, Dominique Raynaud, Vladimir Ya Lipenkov, Marie-France Loutre, Thomas Extier, Anders Svensson, Etienne Legrain, Patricia Martinerie, Markus Leuenberger, Wei Jiang, Florian Ritterbusch, Zheng-Tian Lu, and Guo-Min Yang
Clim. Past, 19, 2257–2286, https://doi.org/10.5194/cp-19-2257-2023, 2023
A new federative chronology for five deep polar ice cores retrieves 800 000 years of past climate variations with improved accuracy. Precise ice core timescales are key to studying the mechanisms linking changes in the Earth’s orbit to the diverse climatic responses (temperature and atmospheric greenhouse gas concentrations). To construct the chronology, new measurements from the oldest continuous ice core as well as glaciological modeling estimates were combined in a statistical model.
PubDate: Fri, 10 Nov 2023 14:54:02 +010
DOI: 10.5194/cp-19-2257-2023 2023
- Highly stratified mid-Pliocene Southern Ocean in PlioMIP2
Abstract: Highly stratified mid-Pliocene Southern Ocean in PlioMIP2
Julia E. Weiffenbach, Henk A. Dijkstra, Anna S. von der Heydt, Ayako Abe-Ouchi, Wing-Le Chan, Deepak Chandan, Ran Feng, Alan M. Haywood, Stephen J. Hunter, Xiangyu Li, Bette L. Otto-Bliesner, W. Richard Peltier, Christian Stepanek, Ning Tan, Julia C. Tindall, and Zhongshi Zhang
Clim. Past Discuss., https//doi.org/10.5194/cp-2023-83,2023
Preprint under review for CP (discussion: open, 0 comments)
Elevated atmospheric CO2 concentrations and a smaller Antarctic ice sheet during the mid-Pliocene (~3 million years ago) cause the Southern Ocean surface to become fresher and warmer, which affects the global ocean circulation. The CO2 concentration and the smaller Antarctic ice sheet both have a similar and approximately equal impact on the Southern Ocean. The conditions of the Southern Ocean in the mid-Pliocene could therefore be analogous to those in a future climate with smaller ice sheets.
PubDate: Wed, 08 Nov 2023 14:54:02 +010
DOI: 10.5194/cp-2023-832023
- Hydroclimate extreme events detected by a sub-decadal diatom oxygen
isotope record of the last 220 years from Lake Khamra, Siberia
Abstract: Hydroclimate extreme events detected by a sub-decadal diatom oxygen isotope record of the last 220 years from Lake Khamra, Siberia
Amelie Stieg, Boris K. Biskaborn, Ulrike Herzschuh, Jens Strauss, Luidmila Pestryakova, and Hanno Meyer
Clim. Past Discuss., https//doi.org/10.5194/cp-2023-85,2023
Preprint under review for CP (discussion: open, 0 comments)
Siberia is impacted by recent climate warming and experiences extreme hydroclimate events. We present a 220 year long sub-decadal stable oxygen isotope record of diatoms from Lake Khamra. Our analysis identifies winter precipitation as the key process impacting the isotope variability, highlighting two extreme dry periods. These two events were found to coincide with significant changes in lake internal conditions and increased wildfire activity in the region.
PubDate: Tue, 07 Nov 2023 14:54:02 +010
DOI: 10.5194/cp-2023-852023
- Sensitivity of Neoproterozoic snowball-Earth inceptions to continental
configuration, orbital geometry, and volcanism
Abstract: Sensitivity of Neoproterozoic snowball-Earth inceptions to continental configuration, orbital geometry, and volcanism
Julius Eberhard, Oliver E. Bevan, Georg Feulner, Stefan Petri, Jeroen van Hunen, and James U. L. Baldini
Clim. Past, 19, 2203–2235, https://doi.org/10.5194/cp-19-2203-2023, 2023
During at least two phases in its past, Earth was more or less covered in ice. These “snowball Earth” events probably started suddenly upon undercutting a certain threshold in the carbon-dioxide concentration. This threshold can vary considerably under different conditions. In our study, we find the thresholds for different distributions of continents, geometries of Earth’s orbit, and volcanic eruptions. The results show that the threshold might have varied by up to 46 %.
PubDate: Mon, 06 Nov 2023 14:54:02 +010
DOI: 10.5194/cp-19-2203-2023 2023
- Rejuvenating the ocean: mean ocean radiocarbon, CO2 release, and
radiocarbon budget closure across the last deglaciation
Abstract: Rejuvenating the ocean: mean ocean radiocarbon, CO2 release, and radiocarbon budget closure across the last deglaciation
Luke Skinner, Francois Primeau, Aurich Jeltsch-Thömmes, Fortunat Joos, Peter Köhler, and Edouard Bard
Clim. Past, 19, 2177–2202, https://doi.org/10.5194/cp-19-2177-2023, 2023
Radiocarbon is best known as a dating tool, but it also allows us to track CO2 exchange between the ocean and atmosphere. Using decades of data and novel mapping methods, we have charted the ocean’s average radiocarbon ″age” since the last Ice Age. Combined with climate model simulations, these data quantify the ocean’s role in atmospheric CO2 rise since the last Ice Age while also revealing that Earth likely received far more cosmic radiation during the last Ice Age than hitherto believed.
PubDate: Fri, 03 Nov 2023 15:07:54 +010
DOI: 10.5194/cp-19-2177-2023 2023
- Unraveling the complexities of the Last Glacial Maximum climate: the role
of individual boundary conditions and forcings
Abstract: Unraveling the complexities of the Last Glacial Maximum climate: the role of individual boundary conditions and forcings
Xiaoxu Shi, Martin Werner, Hu Yang, Roberta D'Agostino, Jiping Liu, Chaoyuan Yang, and Gerrit Lohmann
Clim. Past, 19, 2157–2175, https://doi.org/10.5194/cp-19-2157-2023, 2023
The Last Glacial Maximum (LGM) marks the most recent extremely cold and dry time period of our planet. Using AWI-ESM, we quantify the relative importance of Earth's orbit, greenhouse gases (GHG) and ice sheets (IS) in determining the LGM climate. Our results suggest that both GHG and IS play important roles in shaping the LGM temperature. Continental ice sheets exert a major control on precipitation, atmospheric dynamics, and the intensity of El Niño–Southern Oscillation.
PubDate: Thu, 02 Nov 2023 15:07:54 +010
DOI: 10.5194/cp-19-2157-2023 2023
- Limited exchange between the deep Pacific and Atlantic oceans during the
warm mid-Pliocene and Marine Isotope Stage M2 “glaciation”
Abstract: Limited exchange between the deep Pacific and Atlantic oceans during the warm mid-Pliocene and Marine Isotope Stage M2 “glaciation”
Anna Hauge Braaten, Kim A. Jakob, Sze Ling Ho, Oliver Friedrich, Eirik Vinje Galaasen, Stijn De Schepper, Paul A. Wilson, and Anna Nele Meckler
Clim. Past, 19, 2109–2125, https://doi.org/10.5194/cp-19-2109-2023, 2023
In the context of understanding current global warming, the middle Pliocene (3.3–3.0 million years ago) is an important interval in Earth's history because atmospheric carbon dioxide concentrations were similar to levels today. We have reconstructed deep-sea temperatures at two different locations for this period, and find that a very different mode of ocean circulation or mixing existed, with important implications for how heat was transported in the deep ocean.
PubDate: Wed, 01 Nov 2023 15:07:54 +010
DOI: 10.5194/cp-19-2109-2023 2023
- Reconstructing 15 000 years of southern France temperatures from
coupled pollen and molecular (branched glycerol dialkyl glycerol
tetraether) markers (Canroute, Massif Central)
Abstract: Reconstructing 15 000 years of southern France temperatures from coupled pollen and molecular (branched glycerol dialkyl glycerol tetraether) markers (Canroute, Massif Central)
Léa d'Oliveira, Lucas Dugerdil, Guillemette Ménot, Allowen Evin, Serge D. Muller, Salomé Ansanay-Alex, Julien Azuara, Colline Bonnet, Laurent Bremond, Mehmet Shah, and Odile Peyron
Clim. Past, 19, 2127–2156, https://doi.org/10.5194/cp-19-2127-2023, 2023
In southern Europe, Holocene climate variability is characterized by a strong heterogeneity whose patterns are still poorly understood. Here, a multi-proxy approach (pollen and biomarkers) is applied to the Canroute sequence to reconstruct the climatic variation over the last 15 000 years in southern Massif Central, France. Results reveal that reconstructions of regional climate trends notably differ depending on proxies and sites, notably concerning the presence of a Holocene thermal maximum.
PubDate: Wed, 01 Nov 2023 15:07:54 +010
DOI: 10.5194/cp-19-2127-2023 2023
- Pollen-based reconstructions of Holocene climate trends in the eastern
Mediterranean region
Abstract: Pollen-based reconstructions of Holocene climate trends in the eastern Mediterranean region
Esmeralda Cruz-Silva, Sandy P. Harrison, I. Colin Prentice, Elena Marinova, Patrick J. Bartlein, Hans Renssen, and Yurui Zhang
Clim. Past, 19, 2093–2108, https://doi.org/10.5194/cp-19-2093-2023, 2023
We examined 71 pollen records (12.3 ka to present) in the eastern Mediterranean, reconstructing climate changes. Over 9000 years, winters gradually warmed due to orbital factors. Summer temperatures peaked at 4.5–5 ka, likely declining because of ice sheets. Moisture increased post-11 kyr, remaining high from 10–6 kyr before a slow decrease. Climate models face challenges in replicating moisture transport.
PubDate: Wed, 01 Nov 2023 15:07:54 +010
DOI: 10.5194/cp-19-2093-2023 2023
- Drought reconstruction since 1796 CE based on tree-ring widths in the
upper Heilongjiang (Amur) River basin in Northeast Asia and its linkage to
Pacific Ocean climate variability
Abstract: Drought reconstruction since 1796 CE based on tree-ring widths in the upper Heilongjiang (Amur) River basin in Northeast Asia and its linkage to Pacific Ocean climate variability
Yang Xu, Heli Zhang, Feng Chen, Shijie Wang, Mao Hu, Martín Hadad, and Fidel Roig
Clim. Past, 19, 2079–2092, https://doi.org/10.5194/cp-19-2079-2023, 2023
We reconstructed the monthly mean self-calibrating Palmer drought severity index for May–July in the upper Heilongjiang (Amur) Basin since 1796. Our analysis suggests that the dry/wet variability in this basin is related to several large-scale climate stresses and atmospheric circulation patterns (El Niño–Southern Oscillation). The cause of drought is primarily a reduction in advective water vapor transport, rather than precipitation circulation processes.
PubDate: Mon, 30 Oct 2023 18:55:42 +010
DOI: 10.5194/cp-19-2079-2023 2023
- A Holocene history of climate, fire, landscape evolution, and human
activity in Northeast Iceland
Abstract: A Holocene history of climate, fire, landscape evolution, and human activity in Northeast Iceland
Nicolò Ardenghi, David John Harning, Jonathan Henrik Raberg, Brooke René Holman, Thorvaldur Thordarson, Áslaug Geirsdóttir, Gifford H. Miller, and Julio Sepúlveda
Clim. Past Discuss., https//doi.org/10.5194/cp-2023-74,2023
Preprint under review for CP (discussion: open, 0 comments)
Analysing a sediment record from Stóra Viðarvatn (NE Iceland), we reveal how natural factors and human activities influenced environmental changes (erosion, wildfires) over the last 11,000 years. We found increased fire activity around 3,000 and 1,500 years ago, predating human settlement, likely driven by natural factors like precipitation shifts. Declining summer temperatures increased erosion vulnerability, exacerbated by farming and animal husbandry, which in turn may have reduced wildfires.
PubDate: Fri, 27 Oct 2023 18:55:42 +020
DOI: 10.5194/cp-2023-742023
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