Steven Hostetler, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 82
Atmospheric transmission of North Atlantic Heinrich events Atmospheric transmission of North Atlantic Heinrich events
We model the response of the climate system during Heinrich event 2 (H2) by employing an atmospheric general circulation model, using boundary conditions based on the concept of a “canonical” Heinrich event. The canonical event is initialized with a full-height Laurentide ice sheet (LIS) and CLIMAP sea surface temperatures (SSTs), followed by lowering of the LIS, then warming of North...
Authors
S. Hostetler, P.U. Clark, P. J. Bartlein, A.C. Mix, N.J. Pisias
Simulating the water balance of the Aral Sea with a coupled regional climate-lake model Simulating the water balance of the Aral Sea with a coupled regional climate-lake model
Before coupled atmosphere-lake models can be used to study the response of large lake systems to climatic forcings, we must first evaluate how well they simulate the water balance and associated lake atmosphere interactions under present-day conditions. We evaluate the hydrology simulated by a lake model coupled to NCAR's regional climate model (RegCM2) in a study of the Aral Sea. The
Authors
E.E. Small, L.C. Sloan, S. Hostetler, F. Giorgi
Foraminiferal faunal estimates of paleotemperature: Circumventing the no-analog problem yields cool ice age tropics Foraminiferal faunal estimates of paleotemperature: Circumventing the no-analog problem yields cool ice age tropics
The sensitivity of the tropics to climate change, particularly the amplitude of glacial-to-interglacial changes in sea surface temperature (SST), is one of the great controversies in paleoclimatology. Here we reassess faunal estimates of ice age SSTs, focusing on the problem of no-analog planktonic foraminiferal assemblages in the equatorial oceans that confounds both classical transfer...
Authors
A.C. Mix, A.E. Morey, N. Pisias, S. Hostetler
Response of North American freshwater lakes to simulated future climates Response of North American freshwater lakes to simulated future climates
We apply a physically based lake model to assess the response of North American lakes to future climate conditions as portrayed by the transient trace-gas simulations conducted with the Max Planck Institute (ECHAM4) and the Canadian Climate Center (CGCM1) atmosphere-ocean general circulation models (A/OGCMs). To quantify spatial patterns of lake responses (temperature, mixing, ice cover
Authors
S. Hostetler, E.E. Small
Reassessment of ice-age cooling of the tropical ocean and atmosphere Reassessment of ice-age cooling of the tropical ocean and atmosphere
The CLIMAP project's reconstruction of past sea surface temperature inferred limited ice-age cooling in the tropical oceans. This conclusion has been controversial, however, because of the greater cooling indicated by other terrestrial and ocean proxy data. A new faunal sea surface temperature reconstruction, calibrated using the variation of foraminiferal species through time, better...
Authors
S. Hostetler, A.C. Mix
A strategy for assessing potential future changes in climate, hydrology, and vegetation in the Western United States A strategy for assessing potential future changes in climate, hydrology, and vegetation in the Western United States
Historical and geological data indicate that significant changes can occur in the Earth's climate on time scales ranging from years to millennia. In addition to natural climatic change, climatic changes may occur in the near future due to increased concentrations of carbon dioxide and other trace gases in the atmosphere that are the result of human activities. International research...
Authors
Robert Thompson, Steven Hostetler, Patrick Bartlein, Katherine Anderson
Science and Products
Filter Total Items: 82
Atmospheric transmission of North Atlantic Heinrich events Atmospheric transmission of North Atlantic Heinrich events
We model the response of the climate system during Heinrich event 2 (H2) by employing an atmospheric general circulation model, using boundary conditions based on the concept of a “canonical” Heinrich event. The canonical event is initialized with a full-height Laurentide ice sheet (LIS) and CLIMAP sea surface temperatures (SSTs), followed by lowering of the LIS, then warming of North...
Authors
S. Hostetler, P.U. Clark, P. J. Bartlein, A.C. Mix, N.J. Pisias
Simulating the water balance of the Aral Sea with a coupled regional climate-lake model Simulating the water balance of the Aral Sea with a coupled regional climate-lake model
Before coupled atmosphere-lake models can be used to study the response of large lake systems to climatic forcings, we must first evaluate how well they simulate the water balance and associated lake atmosphere interactions under present-day conditions. We evaluate the hydrology simulated by a lake model coupled to NCAR's regional climate model (RegCM2) in a study of the Aral Sea. The
Authors
E.E. Small, L.C. Sloan, S. Hostetler, F. Giorgi
Foraminiferal faunal estimates of paleotemperature: Circumventing the no-analog problem yields cool ice age tropics Foraminiferal faunal estimates of paleotemperature: Circumventing the no-analog problem yields cool ice age tropics
The sensitivity of the tropics to climate change, particularly the amplitude of glacial-to-interglacial changes in sea surface temperature (SST), is one of the great controversies in paleoclimatology. Here we reassess faunal estimates of ice age SSTs, focusing on the problem of no-analog planktonic foraminiferal assemblages in the equatorial oceans that confounds both classical transfer...
Authors
A.C. Mix, A.E. Morey, N. Pisias, S. Hostetler
Response of North American freshwater lakes to simulated future climates Response of North American freshwater lakes to simulated future climates
We apply a physically based lake model to assess the response of North American lakes to future climate conditions as portrayed by the transient trace-gas simulations conducted with the Max Planck Institute (ECHAM4) and the Canadian Climate Center (CGCM1) atmosphere-ocean general circulation models (A/OGCMs). To quantify spatial patterns of lake responses (temperature, mixing, ice cover
Authors
S. Hostetler, E.E. Small
Reassessment of ice-age cooling of the tropical ocean and atmosphere Reassessment of ice-age cooling of the tropical ocean and atmosphere
The CLIMAP project's reconstruction of past sea surface temperature inferred limited ice-age cooling in the tropical oceans. This conclusion has been controversial, however, because of the greater cooling indicated by other terrestrial and ocean proxy data. A new faunal sea surface temperature reconstruction, calibrated using the variation of foraminiferal species through time, better...
Authors
S. Hostetler, A.C. Mix
A strategy for assessing potential future changes in climate, hydrology, and vegetation in the Western United States A strategy for assessing potential future changes in climate, hydrology, and vegetation in the Western United States
Historical and geological data indicate that significant changes can occur in the Earth's climate on time scales ranging from years to millennia. In addition to natural climatic change, climatic changes may occur in the near future due to increased concentrations of carbon dioxide and other trace gases in the atmosphere that are the result of human activities. International research...
Authors
Robert Thompson, Steven Hostetler, Patrick Bartlein, Katherine Anderson