Long-term indicators are derivate from WMOP in order to follow the temporal evolution of the mode overall the WMOP domain but also over some key sub-basins such as the Alboran Sea, the Balearic Sea and the Gulf of Lion. You will find in this section the main choosen indicators.
Figure 1: Bathymetry of the WMOP domain. The red boxes represent the considered sub-basins and the pink lines the section used to estimate transport in the corresponding section.
This subsection allows to monitor the temporal evolution of this parameter. Figure 1 displays the WMOP yesterday mean SST. Figure 2 represents the daily mean and basin averaged SST timeseries for the last month.
|Figure 1: Yesterday WMOP SST||Figure 2: Last month WMOP mean SST overall the domain|
|Figure 1: Yesterday WMOP SSS||Figure 2: Last month WMOP mean SSS overall the WMOP domain|
The kinetic energy (KE) of the ocean is the energy which it possesses due to its circulation.
Figure 1 displays the WMOP yesterday mean KE. Figure 2 represents the daily mean and basin averaged KE timeseries for the last month.
|Figure 1: Yesterday WMOP KE||Figure 2: Last month WMOP mean KE overall the WMOP domain|
The mixed layer depths are calculated using a density criterion with a threshold value ∆σθ corresponding to a fixed ∆T=0.2°C. D’Ortenzio et al. (2005) have shown that this criterion is more suitable in the Western Mediterranean Sea.
Figure 1 displays the WMOP yesterday mean MLD. Figure 2 represents the daily mean and basin averaged MLD timeseries for the last month.
|Figure 1: Yesterday WMOP MLD||Figure 2: Last month WMOP mean MLD overall the WMOP domain|
The western basin of the Mediterranean Sea comprises three water masses (Robinson et al., 2001): the surface layer upper the first 150m dominated by the inflow of Atlantic waters, the Levantine intermediate layer between 150-600m and deep waters below 600m. The first layer is where mostly of the air-sea heat exchanges occur. Therefore, the heat content integrated within [0-150m] is a useful climatic proxy to monitor the ocean heat content as well as the air-sea heat exchanges.
Figure 1 displays the WMOP yesterday mean Heat content [0-150m]. Figure 2 represents the daily mean and basin averaged Heat content [0-150m] timeseries for the last month.
|Figure 1: Last month WMOP Heat Content with [0-150m] overall the WMOP domain|
In this section, transports in key sections (see pink lines on Figure 1 in the section "Indicators menu") are calculated and displayed. By convention, northward and eastward transport are positive (inflow).
The narrow and shallow Strait of Gibraltar connects the Atlantic Ocean with the Mediterranean Sea. It is ~60 km long and ~20 km wide, with a minimum width of 15 km near Tarifa and a shallow sill located near Camarinal (west of Tarifa), with a minimum depth of 300 m. An excess of evaporation with respect to the freshwater input and the conservation of mass and salt in the Mediterranean Sea drive the mean circulation in the strait. The mean circulation, generally called inverse estuarine, is characterized by two counterflowing currents: in the upper layer, Atlantic Water with a salinity of ~36.2 practical salinity units (psu) flows eastward, spreading into the Mediterranean Sea, and in the lower layer, Mediterranean Water with a salinity of ~38.4 psu flows westward toward the Atlantic Ocean (Lacombe and Richez, 1982). Thus, the Gibraltar strait is a key transport section. Figure 1 displays the last month inflow, outflow and net transport through this section.
For the Balearic Sea, it is very important to monitor the entrance of Atlantic Water and exit of Mediterranean Water through the Ibiza Channel (Figure 2) since it can modulate both the Balearic Sea circulation and the Alboran Sea circulation (e.g. presence of Almeria-Oran front, gyral circulation, see the Research section for further details). Additionally, to complete the monitoring of the Balearic Sea water masses transport, Figures 3 and 4 provide the inflow, outflow and net transport through the Mallorca Channel and the Mallorca-Peninsula Channel.
|Figure 1: Strait of Gibraltar Net Transport||Figure 2: Ibiza Channel Net Transport|
|Figure 3: Mallorca Channel Net Transport||Figure 4: Mallorca-Peninsula Channel Net Transport|