Influence of microclimate on the distribution of temperature salinity and chlorophyll in the Tampamachoco Lake, Veracruz, SW Gulf of Mexico [Influencia del Clima sobre la Distribucion de Temperatura, Salinidad y Clorofila a, en la Laguna de
Por:
Sánchez Santillán N., De Lanza Espino G., Sánchez Trejo R.
Publicada:
1 ene 1997
Resumen:
The qualitative and quantitative effects of the microclimatic factors (temperature, rainfall, evaporation and dominant winds) on water salinity and temperature in Laguna de Tampamachoco, Veracruz are presented in this paper. Water temperature and salinity defined five hydrologically different areas within the lagoon during three seasons (northers, dry and rainy season): (I) the Estero de la Mata constitutes 6% of the total area, with averages of 21.7°C and 31.35‰ during the northers, 25.1°C and 21.77‰ during the dry season and 22.8°C and 25.25‰ during the rains, (II) the main waterbody makes up 24% of the lagoon, with averages of 22°C and 33.26‰ during the northers, 27.1°C and 30.60‰ during the dry season and 28.7°C and 25.80‰ during the rains, (III) the southwestern reaches of the lagoon constitute 20%, with averages of 23.8°C and 30.87‰ during the northers, 27.8°C and 31.98‰ during the dry season and 30.2°C and 23‰ during the rains, (IV) the western region of the lagoon makes up 20%, with averages of 23.6°C and 29.57‰ during the northers, 27.8°C and 32.26‰ during the dry season and 29.2°C and 27.76‰ during the rains, and (V) the extensions to the northwest of the lagoon constitute 30% of total area, with averages of 23.6°C and 25.87‰ during the northers, 26.2°C and 31.38‰ during the dry season and 29.3°C and 26.10‰ during the rains. Water salinity in the five areas and three seasons was the result of evaporation (16%) and rainfall (63%), whereas water temperature depended on the air temperature (50%). Wind generated currents mix the water column during the three seasons, with speeds of 8.1 m/seg, 6.5 m/seg during the dry season and 7.5 m/seg during the rains. The spatial and temporal distribution of chlorophyll a was similar in the five areas. The temporal distribution was more ample that the spatial distribution, with 5.25 mg/m3 during the northers, 22.6 mg/m3 during the dry season and 24.43 mg/m3 during the rains. The spatial distribution is explanation is explained by the wind currents and the temporal distribution is explained by changes in salinity caused by rain inputs.
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