Spectral analysis of the AVHRR sea surface temperature variability off the west coast of Vancouver Island

1989 ◽  
Vol 27 (3) ◽  
pp. 577-587 ◽  
Author(s):  
Ralf Bürgert ◽  
William W. Hsieh
Keyword(s):  
Spectral Analysis ◽  
Surface Temperature ◽  
Sea Surface Temperature ◽  
West Coast ◽  
Vancouver Island ◽  
Temperature Variability ◽  
Sea Surface ◽  
The West

Reduced eastern tropical Atlantic sea surface temperature variability at the end of the Green Sahara

2021 ◽  
Author(s):  
Gerald Rustic ◽  
Francesco SR Pausata ◽  
Peter DeMenocal
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
West African Monsoon ◽  
Walker Circulation ◽  
West African ◽  
Temperature Variability ◽  
Sea Surface ◽  
Tropical Atlantic ◽  
The West ◽  
Monsoon System

<p>Mid-Holocene proxy evidence records profound climatic changes, including alteration of the West African Monsoon system and the end of the ‘Green Sahara’ period. Model simulations have related changes in the West African Monsoon system, which controls present-day seasonal hydroclimate over much of the African continent north of the equator, to alterations of the tropical Walker circulation. Here we investigate the change in tropical sea surface temperature variability in the eastern tropical Atlantic, where ocean-atmosphere coupling is robust. Through analysis of the distribution of oxygen isotopes from the tests of individual specimens of the surface-dwelling foraminifer <em>Globigerinoides ruber</em>, we find that SST variability is significantly decreased at the end of the Green Sahara period ~3.5-5kya. During the period of reduced variability we also observe changes in the background state of the tropical Atlantic as characterized by the east-west SST gradient, linking variability to background conditions. We compare our record to co-eval records of tropical Pacific variability that describe changes to the El Niño Southern Oscillation, as well as to records of hydroclimate change in Southeast Asia, and find similarities in these records, suggesting a common origin of these climate signals. Taken together, this evidence points toward an alteration of the tropical Walker circulation which may, in part, be related to changes in vegetation and dust loading occurring during the drying of the Sahara at mid-Holocene.</p>

Submersible observations on the daytime vertical distribution of Aequorea ?forskalea off the west coast of southern Africa

2005 ◽  
Vol 85 (3) ◽  
pp. 519-522 ◽  
Author(s):  
Conrad Sparks ◽  
Andrew S. Brierley ◽  
Emmanuelle Buecher ◽  
Dave Boyer ◽  
Bjøern Axelsen ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Southern Africa ◽  
West Coast ◽  
Sea Surface ◽  
The West ◽  
Spatial Overlap ◽  
The Mean ◽  
The Vertical Distribution

The vertical distribution of the hydromedusa Aequorea ?forskalea was investigated using observations from the research submersible ‘Jago’ collected during 36 dives off the west coast of southern Africa during November 1997 and April 1999. The mean population depth of Aequorea ?forskalea deepened with increasing sea surface temperature. We suggest that this behaviour enables individuals to avoid offshore advection, to minimize spatial overlap with other large medusae and to maintain their position over the middle of the shelf.

scholarly journals Sea surface temperature and southwest monsoon over India

MAUSAM ◽  
2021 ◽  
Vol 42 (1) ◽  
pp. 71-76
Author(s):  
T. K. RAY
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
West Coast ◽  
Arabian Sea ◽  
Late Onset ◽  
Southwest Monsoon ◽  
North Indian Ocean ◽  
Sea Surface ◽  
The West ◽  
West Coast Of India

Importance of sea surface temperature (SST) over the Arabian Sea, Bay of Bengal and the north Indian Ocean is studied in relation with the formation and m1intenan';e of the southwest monsoon over India. SST over southeast Arabian Sea close to the west coast of India becomes maximum before the onset of monsoon over Kerala. Crossing of the equator by southern hemispheric warm water seems to be related with the early or late onset of the monsoon. Magnitude of the difference between SST and air temperature during pre-onset weeks gives valuable hints for early/late and excess/deficient monsoon. A large warm winter mass up to the depth of 100 metres shifts towards the west coast of India before the onset of the monsoon. In 1979, back and forth movement of this water mass seems to be related with the different phases of the monsoon over India.  

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