000 02256nab a22002894ib4500
003 PH-QcNFR
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008 230801b |||||||| |||| 00| 0 eng d
022 _a2672-2836 (Online)
040 _aPH-QcNFR
_beng
_cPH-QcNFR
100 1 _aMegia, Teodoro
_91890
245 1 4 _aThe Thermal structure of the surface waters off western Philippines based on BT observations /
_cTeodoro Megia and Alfonso R. Sebastian.
336 _atxt
_btxt
337 _ac
_bc
338 _acr
_bcr
347 _atext file
_bPDF
504 _aIncludes bibliographical references
520 3 _aWithin the lighted portion of the water column in Philippine waters there are two distinct layers easily distinguishable by their thermal structure. Superimposed upon the discontinuity layer or the main thermocline is the mixed or isothermal layer of uniformly high temperature. Owing to phytoplankton activity, the isothermal layer is generally deficient in the chemical nutrients known to regulate and limit plant growth. The thermocline below militates against the vertical movements of the richer waters beneath it, as a consequence of which there is no active replenishment of the impoverished waters within the isothermal layer. While it is highly desirable to study the thermal structure of both layers in order to acquire a more thorough understanding of the mechanisms controlling nutrient exchange, the BT (bathythermograph) tows did not penetrate deep enough to reach the lower boundary of the main thermocline. The maximum BT penetration never exceeded 150 meters. Below this depth there were still evident significant temperature gradients as shown by the vertical temperature distribution curves based on the hydrographic data.
546 _aeng
_beng
650 _aOceanography
_zPhilippines.
_2LCSH
_9490
650 _aHydrology
_zPhilippines
_2LCSH
_91911
650 _aHydrography
_2LCSH
_91912
700 1 _aSebastian, Alfonso R.
_eauthor.
773 0 _078
_9127
_aPhilippines.
_oIRC00002
_tThe Philippine Journal of Fisheries
_x2672-2836 (Online)
_gVolume 1, Issue no. 2 (July - December 1951), page 139 - 152
856 _2https
_uhttps://www.nfrdi.da.gov.ph/tpjf/vol1_2/pp%20139-152.php
_yOnline access
942 _2lcc
_n0
_cJA
_iIMC000008
999 _c470
_d470