scholarly journals Seasonal heat budget of the Mediterranean Sea

2005 ◽  
Vol 110 (C12) ◽  
Author(s):  
C. Matsoukas ◽  
A. C. Banks ◽  
N. Hatzianastassiou ◽  
K. G. Pavlakis ◽  
D. Hatzidimitriou ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Heat Budget ◽  
Seasonal Heat Budget ◽  
The Mediterranean ◽  
Seasonal Heat

scholarly journals A Seasonal Heat Budget across the Extent of the California Current

2007 ◽  
Vol 37 (3) ◽  
pp. 518-530 ◽  
Author(s):  
Kathleen A. Edwards ◽  
Kathryn A. Kelly
Keyword(s):  
Heat Flux ◽  
Heat Loss ◽  
Heat Storage ◽  
Heat Budget ◽  
California Current ◽  
Data Set ◽  
Heat Advection ◽  
Storage Rate ◽  
Seasonal Heat Budget ◽  
Seasonal Heat

Abstract A seasonal heat budget is based on observations that span the broad California Current (CC) region. Budget terms are estimated from satellite data (oceanic heat advection), repeat ship transects (heat storage rate), and the Comprehensive Ocean–Atmosphere Data Set (COADS) (surface heat flux). The balance between terms differs with distance from shore. Offshore, a local balance between the heat storage rate and net heat flux (Q0) holds; the latter is dominated by its shortwave component QSW. Shoreward of ∼500 km, oceanic heat advection shifts the phase of the heat storage rate to earlier in the year and partially offsets an increase in Q0 due to cloud clearing. During the summer maximum of Q0, the ∼500-km-wide CC region loses heat to alongshore geostrophic transport, offshore Ekman transport, and, to a lesser degree, cross-shore geostrophic transport and eddy transport. The advective heat loss is neither uniform in space nor temporal phase; instead, the region of geostrophic and eddy heat loss expands cross shore with the annual widening of the California Current to ∼500 km. This expansion begins in spring with the onset of equatorward winds. A region of relatively positive wind stress curl widens at the same gradual rate as the CC, suggesting a coupling mechanism between the two.

Runoff Regulation for Hydropower and its Effects on the Ocean Environment

1975 ◽  
Vol 2 (4) ◽  
pp. 583-591 ◽  
Author(s):  
H. J. A. Neu
Keyword(s):  
Heat Budget ◽  
Coastal Region ◽  
Power Production ◽  
Spring Runoff ◽  
Runoff Regulation ◽  
Seasonal Heat Budget ◽  
Seasonal Heat ◽  
Ocean Environment ◽  
Autumn And Winter ◽  
Seasonal Discharge

It has not yet been recognized that modification of the natural seasonal discharge of rivers might result in significant consquences to the ecology of the adjacent marine environment. An example of such regulation is the St. Lawrence system in which, in order to optimize power production, large quantities of water from the spring runoff are retained in storage lakes and returned to the river during the low natural discharge period of autumn and winter. It has been estimated that under present conditions the spring and summer runoff at the entrance to the Gulf of St. Lawrence has been reduced by between one third and one half.This drastic alteration of the natural runoff has caused significant changes in the physics and dynamics of the waters of the Estuary, Gulf, and adjacent coastal region. It is argued that such modifications produce a profound impact on the biological balance of the whole ecosystem, as well as changes in the seasonal heat budget.

Mediterranean Marine heatwaves: On the comparison of the physical drivers behind the 2003 and 2015 events

2020 ◽  
Author(s):  
Sofia Darmaraki ◽  
Samuel Somot ◽  
Robin Waldman ◽  
Florence Sevault ◽  
Pierre Nabat ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Large Scale ◽  
Climate Model ◽  
Heat Budget ◽  
Hot Spot ◽  
Regional Climate ◽  
Detection Algorithm ◽  
Heat Fluxes ◽  
Basin Scale ◽  
The Mediterranean

<p>Over the last decade, an intensification of extreme warm temperature events, termed as marine heatwaves (MHWs), has been reported in the Mediterranean Sea, itself a “Hot Spot” region for climate change. In the summer of 2003, a major MHW occurred in the Mediterranean with abnormal surface temperature anomalies of 2-3 Cº persisting for over a month. In 2015, an undocumented but more intense summer MHW affected almost the entire Mediterranean Sea with regional temperatures anomalies reaching 4-5 Cº. Here, we apply a MHW detection algorithm for long-lasting and large-scale summer events, on the hindcast output of a fully-coupled regional climate model (RCSM). We first examine the spatial variability and temporal evolution of both the 2003 and 2015 events. Then a basin-scale analysis of the mixed layer heat budget during each MHW is performed. The ocean and atmospheric components’ contribution is investigated separately during the onset, peak, and decay phases of both events, in order to disentangle the dominant physical processes behind each event. On the large-scale, our results indicate a key role of the wind forcing and the air-sea heat fluxes, while advection processes become more important at local scales. This study provides a comparison of the underlying mechanisms behind the two most intense MHW detected in the Mediterranean Sea during the last decade, constituting key information for the marine ecosystems of the region.</p>

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