Downscaling Last Glacial Maximum climate over southern Africa
نویسندگان
چکیده
منابع مشابه
The Last Glacial Maximum.
We used 5704 14C, 10Be, and 3He ages that span the interval from 10,000 to 50,000 years ago (10 to 50 ka) to constrain the timing of the Last Glacial Maximum (LGM) in terms of global ice-sheet and mountain-glacier extent. Growth of the ice sheets to their maximum positions occurred between 33.0 and 26.5 ka in response to climate forcing from decreases in northern summer insolation, tropical Pac...
متن کاملDoes the Last Glacial Maximum constrain climate sensitivity?
[1] Four simulations with atmosphere-ocean climate models have been produced using identical Last Glacial Maximum ice sheets, topography and greenhouse gas concentrations. Compared to the pre-industrial, the diagnosed radiative feedback parameter ranges between 1.30 and 1.18 Wm K , the tropical ocean sea-surface temperature decreases between 1.7 and 2.7 C, and Antarctic surface air temperature ...
متن کاملReduced El Niño-Southern Oscillation during the Last Glacial Maximum.
El Niño-Southern Oscillation (ENSO) is a major source of global interannual variability, but its response to climate change is uncertain. Paleoclimate records from the Last Glacial Maximum (LGM) provide insight into ENSO behavior when global boundary conditions (ice sheet extent, atmospheric partial pressure of CO2) were different from those today. In this work, we reconstruct LGM temperature v...
متن کاملObliquity Control On Southern Hemisphere Climate During The Last Glacial
Recent paleoclimate reconstructions have challenged the traditional view that Northern Hemisphere insolation and associated feedbacks drove synchronous global climate and ice-sheet volume during the last glacial cycle. Here we focus on the response of the Patagonian Ice Sheet, and demonstrate that its maximum expansion culminated at 28,400 ± 500 years before present (28.4 ± 0.5 ka), more than 5...
متن کاملCan the Last Glacial Maximum constrain climate sensitivity?
[1] We investigate the relationship between the Last Glacial Maximum (LGM) and climate sensitivity across the PMIP2 multi-model ensemble of GCMs, and find a correlation between tropical temperature and climate sensitivity which is statistically significant and physically plausible. We use this relationship, together with the LGM temperature reconstruction of Annan and Hargreaves (2012), to gene...
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ژورنال
عنوان ژورنال: Quaternary Science Reviews
سال: 2019
ISSN: 0277-3791
DOI: 10.1016/j.quascirev.2019.105879