Currents on the continental shelf adjacent to the Laje de Santos (SP, Brazil)*

Fontes, Roberto Fioravanti Carelli; Castro, Belmiro Mendes de

doi:10.1590/S1679-87592017130206504

Roberto Fioravanti Carelli Fontes ^****Corresponding author: rcfontes@clp.unesp.br

Instituto de Biociências - Universidade Estadual Paulista (Praça Infante Dom Henrique, s/n - Parque Bitaru - São Vicente - SP - 11330900 - Brazil)

Belmiro Mendes de Castro

Instituto Oceanográfico - Universidade de São Paulo (Praça do Oceanográfico, 191 - Butantã - São Paulo - SP - 05508120 - Brazil)

**Corresponding author: rcfontes@clp.unesp.br

Figures (10)
Tables (6)

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Figure 1
São Paulo Continental Shelf, highlighting the area of the State Marine Park of Laje de Santos (red rectangle). Bathymetry expressed in meters

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Figure 2
Bathymetric map of the region around the LS1 and LS2 moorings, highlighting the 30 m and 40 m isobaths. Axis x and y represent perpendicular and parallel directions to the isobaths, respectively. The NCEP point indicates the position of wind data.

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Figure 3
Time series of the current vectors measured at LS1, 24 January, 2014 to 4 July, 2014. The scale is indicated in the upper left corner. Vector direction is according to the wind rose in the upper right corner. Abscissa axis: time (mm/dd/yy). Ordinate axis: depth (m).

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Figure 4
Time series of the current vectors measured at LS2 (July to December, 2014). The scale is indicated in the upper left corner. Vector direction is according to the wind rose in the upper right corner. Abscissa axis: time (mm/dd/yy). Ordinate axis: depth (m).

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Figure 5
Time series of the current vectors measured at LS² (January to June, 2015). The scale is indicated in the upper left corner. Vector direction is according to the wind rose in the upper right corner. Abscissa axis: time (mm/dd/yy). Ordinate axis: depth (m).

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Figure 6
Directional histograms of the currents at LS1 on three levels: near the surface (-8 m; upper left panel - a), midwater (-23 m; upper right panel - b) and near the bottom (-35 m; lowest panel - c). Intensity (m.s^-1); direction (°, geographical coordinates); occurrence frequency (%).

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Figure 7
Directional histograms of the currents at LS2 on three levels: near the surface (-3 m; upper left panel - a), midwater (-19 m; upper right panel - b ) and near the bottom (-35 m; lowest panel - c). Intensity (ms^-1); direction (°, geographical coordinates), occurrence frequency (%).

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Figure 8
Energy spectrum (m² s^-2 cph^-1) of the speed vector components normal (u, upper panel) and parallel (v, lower panel) to the isobaths observed at midwater at LS¹.

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Figure 9
Energy spectrum (m² s^-2 cph^-1) of the speed vector components normal (u, upper panel) and parallel (v, lower panel) to the isobaths observed at midwater at LS².

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Figure 10
Directional histogram of the wind at the NCEP point. Intensity (ms^-1); direction (°, geographical coordinates); occurrence frequency (%).

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Table 1
Location and duration of the experiments to collect current meter data at the two sampling points, LS1 and LS2 (see ), of the MAPEM-LS project. Date format: dd/mm/yyyy; hour format: hh:mm.

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Table 2
First statistical moments of the component perpendicular to the isobaths (u) of the current speed vector at LS1 and LS2. Level = L (m); Minimum = Min (ms^-1); Maximum = Max (ms^-1); Average = Avg (ms^-1); Standard Deviation = SD (ms^-1).

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Table 3
First statistical moments of the component parallel to the isobaths (v) of the current speed vector at LS1 and LS2. Level = L (m); Minimum = Min (ms^-1); Maximum = Max (ms^-1); Average = Avg (ms^-1); Standard Deviation = SD (ms^-1).

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Table 4
Variances of the components perpendicular to the isobaths (u) of the current speed vector at LS1 and LS2 on the levels: near the surface (S), midwater (M) and near the bottom (B). Variance-Total was estimated from the original series and the Variance-Filtered was estimated from the filtered series (sub-inertial). Variance-Explained is the percentage ratio between Variance-Filtered and Variance-Total.

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Table 5
Variances of the components parallel to the isobaths (v) of the current speed vector at LS1 and LS2 on the levels: near the surface (S), midwater (M) and near the bottom (B). Variance-Total was estimated for the original series and the Variance-Filtered was estimated for the filtered series (sub-inertial). Variance-Explained is the percentage ratio between Variance-Filtered and Variance-Total.

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Table 6
Amplitude (10^-2 ms^-1) of the components perpendicular (u) and parallel (v) to the isobaths of the tidal current speed vector at LS1 on the levels: near the surface (S), midwater (M) and near the bottom (B). The tidal components M2, S2, K1, O1 and M4 are the most energetic ones.

POINT	LATITUDE	LONGITUDE	LOCAL DEPTH (m)	LAUNCHING-RECOVERY	START-END
LS1	24°18’55.2’S	46°09’44.6’’W	39.3	29/08/2013, 10:24h-11/11/2013, 11:24h	28/08/2013, 10:24h 04/07/2014, 12:34h
				11/11/2013, 12:11h-24/01/2014,10:31h
				24/01/2014,13:04h-04/07/2014-12:34h
LS2	24°17’11.2’’S	46°11’43.0’’W	39.0	04/07/2014, 10:00h-30/09/2014, 12:00h	04/07/2014, 10:00h 11/06/2015, 12:00h
				30/09/2014, 15:00h-18/12/2014, 10:00h
				18/12/2014, 13:00h-11/06/2015, 12:00h

	LS1				LS2
L	Min	Max	Avg	SD	Min	Max	Avg	SD
-3.0	-	-	-	-	-0.60	0.67	0.04	0.16
-8.0	-0.72	0.61	-0.03	0.14	-	-	-	-
-19.0	-	-	-	-	-0.37	0.49	0.01	0.10
-23.0	-0.60	0.33	-0.04	0.10	-	-	-	-
-35.0	-0.46	0.45	-0.02	0.09	-0.22	0.25	0.01	0.06

	LS1				LS2
L	Min	Max	Avg	SD	Min	Max	Avg	SD
-3.0	-	-	-	-	-0.65	0.72	0.03	0.23
-8.0	-0.58	0.61	0.03	0.19	-	-	-	-
-19.0	-	-	-	-	-0.57	0.53	0.00	0.18
-23.0	-0.44	0.50	0.04	0.15	-	-	-	-
-35.0	-0.33	0.37	0.02	0.11	-0.38	0.39	0.01	0.13

	VARIANCE - TOTAL (m² s^-2 )	VARIANCE - FILTERED (m² s^-2 )	VARIANCE- EXPLAINED (%)
LS1 - S	0.0188	0.0064	34.1
LS1 - M	0.0110	0.0052	47.0
LS1 - B	0.0077	0.0034	43.4
LS2 - S	0.0253	0.0142	56.0
LS2 - M	0.0096	0.0048	49.6
LS2 - B	0.0037	0.0015	40.9

	VARIANCE - TOTAL (m² s^-2 )	VARIANCE - FILTERED (m² s^-2 )	VARIANCE- EXPLAINED (%)
LS1 - S	0.0357	0.0253	70.8
LS1 - M	0.0240	0.0207	86.3
LS1 - B	0.0132	0.0112	85.0
LS2 - S	0.0511	0.0380	74.4
LS2 - M	0.0331	0.0286	86.2
LS2 - B	0.0169	0.0146	86.6

COMP.	M₂	S₂	K₁	O₁	M₄
U-S	4.72	3.22	3.97	0.31	0.12
U-M	5.25	3.24	1.16	1.16	0.36
U-B	4.87	3.07	0.83	0.84	0.37
V-S	1.80	1.57	2.88	0.82	1.10
V-M	1.66	1.32	1.30	0.61	1.39
V-B	1.48	1.26	0.84	0.04	1.14

[1] **Corresponding author: rcfontes@clp.unesp.br

Brasil

Brasil

Currents on the continental shelf adjacent to the Laje de Santos (SP, Brazil)^* * Reference article of the Project MAPELMS - Environmental Monitoring of the State Marine Park of Laje de Santos

Abstract

Brasil

Brasil

Currents on the continental shelf adjacent to the Laje de Santos (SP, Brazil)* * Reference article of the Project MAPELMS - Environmental Monitoring of the State Marine Park of Laje de Santos

Abstract

Currents on the continental shelf adjacent to the Laje de Santos (SP, Brazil)^* * Reference article of the Project MAPELMS - Environmental Monitoring of the State Marine Park of Laje de Santos