scholarly journals Empirical eigenfunction analysis of sea surface temperatures in the Western North Atlantic

1996 ◽  
Author(s):  
R. Everson ◽  
P. Cornillon ◽  
L. Sirovich ◽  
A. Webber
Keyword(s):  
North Atlantic ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Surface Temperatures ◽  
Eigenfunction Analysis

scholarly journals A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8

2018 ◽  
Vol 14 (6) ◽  
pp. 901-922 ◽  
Author(s):  
Mari F. Jensen ◽  
Aleksi Nummelin ◽  
Søren B. Nielsen ◽  
Henrik Sadatzki ◽  
Evangeline Sessford ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
North Atlantic ◽  
General Circulation ◽  
Sea Surface ◽  
Reconstruction Method ◽  
Sea Surface Temperatures ◽  
Proxy Data ◽  
Surface Temperatures ◽  
Temperature Reconstructions

Abstract. Here, we establish a spatiotemporal evolution of the sea-surface temperatures in the North Atlantic over Dansgaard–Oeschger (DO) events 5–8 (approximately 30–40 kyr) using the proxy surrogate reconstruction method. Proxy data suggest a large variability in North Atlantic sea-surface temperatures during the DO events of the last glacial period. However, proxy data availability is limited and cannot provide a full spatial picture of the oceanic changes. Therefore, we combine fully coupled, general circulation model simulations with planktic foraminifera based sea-surface temperature reconstructions to obtain a broader spatial picture of the ocean state during DO events 5–8. The resulting spatial sea-surface temperature patterns agree over a number of different general circulation models and simulations. We find that sea-surface temperature variability over the DO events is characterized by colder conditions in the subpolar North Atlantic during stadials than during interstadials, and the variability is linked to changes in the Atlantic Meridional Overturning circulation and in the sea-ice cover. Forced simulations are needed to capture the strength of the temperature variability and to reconstruct the variability in other climatic records not directly linked to the sea-surface temperature reconstructions. This is the first time the proxy surrogate reconstruction method has been applied to oceanic variability during MIS3. Our results remain robust, even when age uncertainties of proxy data, the number of available temperature reconstructions, and different climate models are considered. However, we also highlight shortcomings of the methodology that should be addressed in future implementations.

scholarly journals Modeled and Observed Multidecadal Variability in the North Atlantic Jet Stream and Its Connection to Sea Surface Temperatures

2018 ◽  
Vol 31 (20) ◽  
pp. 8313-8338 ◽  
Author(s):  
Isla R. Simpson ◽  
Clara Deser ◽  
Karen A. McKinnon ◽  
Elizabeth A. Barnes
Keyword(s):  
North Atlantic ◽  
Sea Surface ◽  
Late Winter ◽  
Jet Stream ◽  
Sea Surface Temperatures ◽  
Multidecadal Variability ◽  
The North ◽  
Surface Temperatures ◽  
The North Atlantic ◽  
North Atlantic Jet

Multidecadal variability in the North Atlantic jet stream in general circulation models (GCMs) is compared with that in reanalysis products of the twentieth century. It is found that almost all models exhibit multidecadal jet stream variability that is entirely consistent with the sampling of white noise year-to-year atmospheric fluctuations. In the observed record, the variability displays a pronounced seasonality within the winter months, with greatly enhanced variability toward the late winter. This late winter variability exceeds that found in any GCM and greatly exceeds expectations from the sampling of atmospheric noise, motivating the need for an underlying explanation. The potential roles of both external forcings and internal coupled ocean–atmosphere processes are considered. While the late winter variability is not found to be closely connected with external forcing, it is found to be strongly related to the internally generated component of Atlantic multidecadal variability (AMV) in sea surface temperatures (SSTs). In fact, consideration of the seasonality of the jet stream variability within the winter months reveals that the AMV is far more strongly connected to jet stream variability during March than the early winter months or the winter season as a whole. Reasoning is put forward for why this connection likely represents a driving of the jet stream variability by the SSTs, although the dynamics involved remain to be understood. This analysis reveals a fundamental mismatch between late winter jet stream variability in observations and GCMs and a potential source of long-term predictability of the late winter Atlantic atmospheric circulation.

Sea surface temperatures and ice rafting in the Holocene North Atlantic: climate influences on northern Europe and Greenland

2004 ◽  
Vol 23 (20-22) ◽  
pp. 2113-2126 ◽  
Author(s):  
Matthias Moros ◽  
Kay Emeis ◽  
Bjørg Risebrobakken ◽  
Ian Snowball ◽  
Antoon Kuijpers ◽  
...  
Keyword(s):  
North Atlantic ◽  
Sea Surface ◽  
Northern Europe ◽  
Sea Surface Temperatures ◽  
The Holocene ◽  
Surface Temperatures ◽  
North Atlantic Climate ◽  
Climate Influences ◽  
Ice Rafting

scholarly journals Reevaluation of mid-Pliocene North Atlantic sea surface temperatures

2008 ◽  
Vol 23 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
Marci M. Robinson ◽  
Harry J. Dowsett ◽  
Gary S. Dwyer ◽  
Kira T. Lawrence
Keyword(s):  
North Atlantic ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Surface Temperatures

NORTH ATLANTIC SUBTROPICAL SEA SURFACE TEMPERATURES DURING THE MIOCENE

2019 ◽  
Author(s):  
Lucia Bellino ◽  
◽  
Maria Makarova ◽  
Kenneth G. Miller ◽  
Yair Rosenthal ◽  
...  
Keyword(s):  
North Atlantic ◽  
Sea Surface ◽  
Sea Surface Temperatures ◽  
Surface Temperatures
Sign in / Sign up

Export Citation Format

Share Document