Kira Rehfeld
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View article: A Global Speleothem‐Based Assessment of Spontaneous Dansgaard–Oeschger Type Oscillations in Two Isotope‐Enabled General Circulation Models
A Global Speleothem‐Based Assessment of Spontaneous Dansgaard–Oeschger Type Oscillations in Two Isotope‐Enabled General Circulation Models Open
Several general circulation models have now demonstrated the ability to simulate spontaneous millennial‐scale oscillations that resemble Dansgaard–Oeschger (DO) events. It is often unclear how representative of DO events these simulations …
View article: Atmospheric and Oceanic Pathways Drive Separate Modes of Southern Hemisphere Climate in Simulations of Spontaneous Dansgaard-Oeschger-Type Oscillations
Atmospheric and Oceanic Pathways Drive Separate Modes of Southern Hemisphere Climate in Simulations of Spontaneous Dansgaard-Oeschger-Type Oscillations Open
Dansgaard-Oeschger (DO) events are a dominant mode of millennial-scale climate variability during the last glacial period. While the influence of DO events is most pronounced in the North Atlantic region, global-scale impacts have been det…
View article: Alpine ice core record of large changes in dust, sea-salt, and biogenic aerosol over Europe during deglaciation
Alpine ice core record of large changes in dust, sea-salt, and biogenic aerosol over Europe during deglaciation Open
Aerosol radiative forcing is an important but often poorly understood component of regional climate. While glacier ice contains the most detailed archives of past atmospheric aerosol composition and temperature, no well-preserved ice recor…
View article: Patterns of changing surface climate variability from the Last Glacial Maximum to present in transient model simulations
Patterns of changing surface climate variability from the Last Glacial Maximum to present in transient model simulations Open
As of 2023, global mean temperature has risen by about 1.45±0.12 °C with respect to the 1850–1900 pre-industrial (PI) baseline according to the World Meteorological Organization. This rise constitutes the first period of substantial global…
View article: Atmospheric and Oceanic Pathways Drive Separate Modes of Southern Hemisphere Climate in Simulations of Spontaneous Dansgaard‐Oeschger‐Type Oscillations
Atmospheric and Oceanic Pathways Drive Separate Modes of Southern Hemisphere Climate in Simulations of Spontaneous Dansgaard‐Oeschger‐Type Oscillations Open
Dansgaard‐Oeschger (DO) events are a dominant mode of millennial‐scale climate variability during the last glacial period with most pronounced impacts in the North Atlantic region. In Antarctica, they manifest primarily as a muted and phas…
View article: Testing the reliability of global surface temperature reconstructions of the Last Glacial Cycle with pseudo-proxy experiments
Testing the reliability of global surface temperature reconstructions of the Last Glacial Cycle with pseudo-proxy experiments Open
Reconstructions of past variations in the global mean surface temperature (GMST) are used to characterise the Earth system response to perturbations and to validate Earth system simulations. Beyond the instrumental period, reconstructions …
View article: FathomDEM: an improved global terrain map using a hybrid vision transformer model
FathomDEM: an improved global terrain map using a hybrid vision transformer model Open
The Earth’s terrain is linked to many physical processes, and gaining the most accurate representation is key to work in many sectors from engineering to natural hazards modeling and ecology. Existing global digital elevation models (DEMs)…
View article: Lessons from paleoclimates for recent and future climate change: opportunities and insights
Lessons from paleoclimates for recent and future climate change: opportunities and insights Open
Paleoclimate information has played an instrumental role in showing how fast climate can vary and how large these changes can be. It provided the first vivid demonstration of the relationships between atmospheric greenhouse gas concentrati…
View article: Earth system responses to different levels of greenhouse gas emissions mitigation
Earth system responses to different levels of greenhouse gas emissions mitigation Open
Anthropogenic carbon dioxide (CO 2 ) emissions are the main driver of climate change, with global warming increasing almost linearly with cumulative CO 2 emissions. Hence, future warming will primarily result from future emissions of CO 2 …
View article: Land conversions not climate effects are the dominant consequence of sun-driven CO2 capture, conversion, and sequestration
Land conversions not climate effects are the dominant consequence of sun-driven CO2 capture, conversion, and sequestration Open
Removing carbon dioxide (CO2) from the atmosphere is required for mitigating climate change. Large-scale direct air capture combined with injecting CO2 into geological formations could retain carbon long-term, but demands a substantial amo…
View article: A continental reconstruction of hydroclimatic variability in South America during the past 2000 years
A continental reconstruction of hydroclimatic variability in South America during the past 2000 years Open
Paleoclimatological field reconstructions are valuable for understanding past hydroclimatic variability, which is crucial for assessing potential future hydroclimate changes. Despite being as impactful on societies as temperature variabili…
View article: Environmental versus litter traits as drivers of microbial decomposer functions
Environmental versus litter traits as drivers of microbial decomposer functions Open
Plant litter decomposition is a key ecosystem process with significant implications for global carbon cycling, soil fertility and plant productivity. Given that microbial decomposers are the main players in the decomposition process, it is…
View article: Comment on egusphere-2024-1396
Comment on egusphere-2024-1396 Open
Abstract. As of 2023, global mean temperature has risen by about 1.45 ± 0.12 °C with respect to the 1850–1900 pre-industrial baseline according to the World Meteorological Organization. This rise constitutes the first peri…
View article: State-dependency of dynamic and thermodynamic contributions to effective precipitation changes
State-dependency of dynamic and thermodynamic contributions to effective precipitation changes Open
Reliable projections of the future hydrological cycle are needed for designing adaptation and mitigation measures under global warming. However, uncertainties in the projected sign and magnitude of effective precipitation changes (precipit…
View article: Testing the reliability of global surface temperature reconstructions of the last glacial cycle
Testing the reliability of global surface temperature reconstructions of the last glacial cycle Open
Reconstructing past variations of the global mean surface temperature is used to characterise the Earth system response to perturbations as well as validate Earth system simulations. Reconstructing GMST beyond the instrumental period relie…
View article: Patterns of changing surface climate variability from the Last Glacial Maximum to present in transient model simulations
Patterns of changing surface climate variability from the Last Glacial Maximum to present in transient model simulations Open
As of 2023, global mean temperature has risen by about 1.45 ± 0.12 °C with respect to the 1850–1900 pre-industrial baseline according to the World Meteorological Organization. This rise constitutes the first period of substantial global wa…
View article: SISALv3: a global speleothem stable isotope and trace element database
SISALv3: a global speleothem stable isotope and trace element database Open
Palaeoclimate information on multiple climate variables at different spatiotemporal scales is becoming increasingly important to understand environmental and societal responses to climate change. A lack of high-quality reconstructions of p…
View article: Comment on egusphere-2024-545
Comment on egusphere-2024-545 Open
Abstract. Paleoclimatological field reconstructions are valuable for understanding hydroclimatic variability. While being similarly impactful on societies as temperature variability, hydroclimatic variability has still rem…
View article: Towards spatio-temporal comparison of simulated and reconstructed sea surface temperatures for the last deglaciation
Towards spatio-temporal comparison of simulated and reconstructed sea surface temperatures for the last deglaciation Open
An increasing number of climate model simulations is becoming available for the transition from the Last Glacial Maximum to the Holocene. Assessing the simulations' reliability requires benchmarking against environmental proxy records. To …
View article: Thresholds of Meteorological Factors Conductive to Severe Summer Ozone Pollution in China and Relation of Occurrence Frequency with Large Scale Circulations
Thresholds of Meteorological Factors Conductive to Severe Summer Ozone Pollution in China and Relation of Occurrence Frequency with Large Scale Circulations Open
Daily thresholds of meteorological factors relative to severe summer ozone pollution are determined in the North China Plain (NCP), the Fenhe River and Weihe River Plain (FWP), the Sichuan Basin (SCB), the Changjiang River Plain (CJR) and …
View article: Objective tuning of an EMIC using present-day observations and Last Glacial Maximum climate reconstructions
Objective tuning of an EMIC using present-day observations and Last Glacial Maximum climate reconstructions Open
Climate models rely on parametrizations of unresolved Earth system processes. These often include uncertain parameters that are estimated in a procedure called tuning, where the model output is optimized with respect to selected climate ob…
View article: Reconstructing the global mean surface temperature of the last 130 thousand years
Reconstructing the global mean surface temperature of the last 130 thousand years Open
Global mean surface temperature (GMST) is a fundamental measure of climate evolution in both past and present and a key quantity to evaluate climate simulations. However, for paleoclimate periods, its reconstruction hinges on uncertain and…
View article: Computationally efficient evaluation of Earth System Models in the presence of complex uncertainties
Computationally efficient evaluation of Earth System Models in the presence of complex uncertainties Open
Comparing Earth System Model (ESM) simulations with in-situ, lab, and remote sensing measurements often involves analytically intractable uncertainty structures for example due to observational uncertainties, internal variability in the cl…
View article: Dependence of simulated variability of surface climate on model complexity – insights from an ensemble of transient simulations of the Last Deglaciation
Dependence of simulated variability of surface climate on model complexity – insights from an ensemble of transient simulations of the Last Deglaciation Open
Climate variability is crucial to our understanding of future climate change and its impacts on societies and the natural world. However, the climate records of the observational era are too short to explore long-term variability. Converse…
View article: Towards digital filter methods for CO2 sink and source identification
Towards digital filter methods for CO2 sink and source identification Open
Greenhouse gases (GHG) are considered major environmental pollutants and the dominant cause of the global increase in the average temperature on our planet [1,2]. Atmospheric carbon dioxide (CO2) takes 75% of all the GHG [3], so our resear…
View article: Preconditioned biosphere flux extremes in terrestrial carbon cycle models and reanalyses in the recent past, present, and future
Preconditioned biosphere flux extremes in terrestrial carbon cycle models and reanalyses in the recent past, present, and future Open
The increasing frequency and severity of climate extremes pose a multifaceted threat to health, economic stability, and both natural and human-made environments. Potential overlap and accumulation of extremes as compound extremes poses fur…
View article: Interhemispheric teleconnections as drivers of Southern Hemisphere climate in simulations of spontaneous Dansgaard-Oeschger-type events
Interhemispheric teleconnections as drivers of Southern Hemisphere climate in simulations of spontaneous Dansgaard-Oeschger-type events Open
Dansgaard-Oeschger (DO) events are a dominant mode of millennial-scale climate variability during the last glacial period. While the influences of DO events are most pronounced in the North Atlantic region, their impacts are detectable on …
View article: Implications of biosphere variability for future emission budgets and carbon dioxide removal
Implications of biosphere variability for future emission budgets and carbon dioxide removal Open
The biosphere’s first-order response to changing Earth system conditions shifts under future emission pathways. One can anticipate such low-order responses, like rebounding carbon stocks once emissions diminish when forecasting emiss…
View article: A continental reconstruction of hydroclimatic variability in South America during the past 2000 years
A continental reconstruction of hydroclimatic variability in South America during the past 2000 years Open
Paleoclimatological field reconstructions are valuable for understanding hydroclimatic variability. While being similarly impactful on societies as temperature variability, hydroclimatic variability has still remained less in focus. Howeve…
View article: Age-depth model ensembles for SISAL v3 speleothem records
Age-depth model ensembles for SISAL v3 speleothem records Open
Depth-age model ensembles created for the SISAL database v3 (version for publication), in supplement to Kaushal et al., 2024 and building on Comas-Bru, Rehfeld, Roesch et al., 2020. This upload includes ensemble data for 5 methods (interpo…