Impact of untreated sewage and thermal effluent discharges on the air-sea CO2 fluxes in a highly urbanized tropical coastal region

2021 ◽  
pp. 113166
Author(s):  
C. Muthukumar ◽  
S. Balasubramaniyan ◽  
Deviram Garlapati ◽  
M. Durga Bharathi ◽  
B. Charan Kumar ◽  
...  
Keyword(s):  
Coastal Region ◽  
Co2 Fluxes ◽  
Thermal Effluent ◽  
Untreated Sewage

scholarly journals Aircraft Regional-Scale Flux Measurements over Complex Landscapes of Mangroves, Desert, and Marine Ecosystems of Magdalena Bay, Mexico

2013 ◽  
Vol 30 (7) ◽  
pp. 1266-1294 ◽  
Author(s):  
Rommel C. Zulueta ◽  
Walter C. Oechel ◽  
Joseph G. Verfaillie ◽  
Steven J. Hastings ◽  
Beniamino Gioli ◽  
...  
Keyword(s):  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Regional Scale ◽  
Coastal Region ◽  
Coastal Ocean ◽  
Environmental Research ◽  
Co2 Fluxes ◽  
Natural Ecosystems ◽  
Linear Modeling ◽  
Magdalena Bay

Abstract Natural ecosystems are rarely structurally simple or functionally homogeneous. This is true for the complex coastal region of Magdalena Bay, Baja California Sur, Mexico, where the spatial variability in ecosystem fluxes from the Pacific coastal ocean, eutrophic lagoon, mangroves, and desert were studied. The Sky Arrow 650TCN environmental research aircraft proved to be an effective tool in characterizing land–atmosphere fluxes of energy, CO2, and water vapor across a heterogeneous landscape at the scale of 1 km. The aircraft was capable of discriminating fluxes from all ecosystem types, as well as between nearshore and coastal areas a few kilometers distant. Aircraft-derived average midday CO2 fluxes from the desert showed a slight uptake of −1.32 μmol CO2 m−2 s−1, the coastal ocean also showed an uptake of −3.48 μmol CO2 m−2 s−1, and the lagoon mangroves showed the highest uptake of −8.11 μmol CO2 m−2 s−1. Additional simultaneous measurements of the normalized difference vegetation index (NDVI) allowed simple linear modeling of CO2 flux as a function of NDVI for the mangroves of the Magdalena Bay region. Aircraft approaches can, therefore, be instrumental in determining regional CO2 fluxes and can be pivotal in calculating and verifying ecosystem carbon sequestration regionally when coupled with satellite-derived products and ecosystem models.

scholarly journals Author Correction: Seasonal variability of net sea-air CO2 fluxes in a coastal region of the northern Antarctic Peninsula

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Thiago Monteiro ◽  
Rodrigo Kerr ◽  
Eunice da Costa Machado
Keyword(s):  
Antarctic Peninsula ◽  
Seasonal Variability ◽  
Coastal Region ◽  
Co2 Fluxes

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

scholarly journals Mesoscale circulations over complex terrain in the Valencia coastal region, Spain, Part 1: simulation of diurnal circulation regimes

2006 ◽  
Vol 6 (2) ◽  
pp. 2809-2852 ◽  
Author(s):  
G. Pérez-Landa ◽  
P. Ciais ◽  
M. J. Sanz ◽  
B. Gioli ◽  
F. Miglietta ◽  
...  
Keyword(s):  
Complex Terrain ◽  
Mesoscale Model ◽  
Meteorological Data ◽  
Coastal Region ◽  
Sea Breeze ◽  
Flow Regimes ◽  
Co2 Fluxes ◽  
Atmospheric Concentration ◽  
Night Time ◽  
Mesoscale Circulations

Abstract. We collected ground-based and aircraft data on meteorological parameters and CO2 fluxes and concentrations during a 2-week intensive campaign over the Valencia basin, as part of a process study to understand how mesoscale circulations over complex terrain develop and affect the atmospheric transport acting on surface CO2 fluxes. In this paper, we interpret the meteorological data during a selected case, with the help of a very high resolution mesoscale model to understand the diurnal cycle of mesoscale flow regimes, characterized by night-time katabatic drainage, morning sea-breeze development and subsequent coupling with mountain up-slopes, and evening flow-veering under larger-scale influences. At each step, a careful statistical analysis of the model performances is carried out. Despite the inherent complexity of the processes interacting with each other, and large model uncertainties for soil moisture boundary conditions and turbulence parameterizations, we show that it is possible to simulate faithfully the flow regimes, especially the inland progression and organization of the sea breeze. This provides confidence with respect to the future applicability of mesoscale models to establish a missing link between surface sources of CO2 and atmospheric concentration signals over complex terrain.

scholarly journals CO2 fluxes in the South African coastal region

2017 ◽  
Vol 195 ◽  
pp. 41-49 ◽  
Author(s):  
Verónica Arnone ◽  
Melchor González-Dávila ◽  
J. Magdalena Santana-Casiano
Keyword(s):  
South African ◽  
Coastal Region ◽  
Co2 Fluxes ◽  
The South

Hormonal stimulation and some risk factors studied to improve bovine pregnancy rate at the Coastal areas of Barisal district of Bangladesh

2018 ◽  
Vol 52 (1-4) ◽  
pp. 22-30
Author(s):  
A K Paul ◽  
S M T Rahman
Keyword(s):  
Pregnancy Rate ◽  
Coastal Region ◽  
Hormonal Treatment ◽  
Coastal Areas ◽  
Pregnancy Rates ◽  
Hormonal Stimulation ◽  
Crossbred Cows ◽  
Treatment Groups ◽  
History Of ◽  
Group A

Hormonal treatment of cows at the coastal region of Barisal district of Bangladesh was performed to assess the improvement of pregnancy rate. A total of 100 cows and heifers with irregular history of cyclicity were selected randomly and divided into five treatment groups. The groups were A (treated with anthelmintic), B (treated with anthelmintic, vitamin ADE and multivitamin powder), C (treated with PGF2α), D (treated with GnRH) and E (treated with GnRH and PGF2α). Each group comprised of 20 animals. The age, breed and parity of experimental cows were considered during treatment. In the study, the cows treated with both GnRH and PGF2α (group E) showed significantly (p<0.05) higher estrus (80%) and pregnancy rate (60%) than that of group A, B, C and D. The overall estrus rates of local and crossbred cows were 64% and 70%, respectively and the pregnancy rates were 40 and 52%, respectively. The crossbred cows responded significantly (p<0.05) to hormonal treatment than that of local cows. Parity-2 cows showed higher estrus sign than that of other parities. However, the pregnancy rates were higher significantly (p<0.05) in parity-2 and parity ≥4 cows than that of parity-0, parity-1 and parity-3 cows. The pregnancy rate was also found higher in case of 4 to <5 years old cows than that of 2 to <3, 3 to <4, 5 to <6, and ≥6 years old. It may conclude that the hormonal regimen increases the pregnancy rate as well as decreases the undesired waiting of estrus and conception. Further study with more sample size will reveal the more effective treatment for cows at the coastal areas of Bangladesh.

Hormonal stimulation and some risk factors studied to improve bovine pregnancy rate at the Coastal areas of Barisal district of Bangladesh

2018 ◽  
Vol 52 (1-4) ◽  
pp. 22-30
Author(s):  
A K Paul ◽  
S M T Rahman
Keyword(s):  
Pregnancy Rate ◽  
Coastal Region ◽  
Hormonal Treatment ◽  
Coastal Areas ◽  
Pregnancy Rates ◽  
Hormonal Stimulation ◽  
Crossbred Cows ◽  
Treatment Groups ◽  
History Of ◽  
Group A

Hormonal treatment of cows at the coastal region of Barisal district of Bangladesh was performed to assess the improvement of pregnancy rate. A total of 100 cows and heifers with irregular history of cyclicity were selected randomly and divided into five treatment groups. The groups were A (treated with anthelmintic), B (treated with anthelmintic, vitamin ADE and multivitamin powder), C (treated with PGF2α), D (treated with GnRH) and E (treated with GnRH and PGF2α). Each group comprised of 20 animals. The age, breed and parity of experimental cows were considered during treatment. In the study, the cows treated with both GnRH and PGF2α (group E) showed significantly (p<0.05) higher estrus (80%) and pregnancy rate (60%) than that of group A, B, C and D. The overall estrus rates of local and crossbred cows were 64% and 70%, respectively and the pregnancy rates were 40 and 52%, respectively. The crossbred cows responded significantly (p<0.05) to hormonal treatment than that of local cows. Parity-2 cows showed higher estrus sign than that of other parities. However, the pregnancy rates were higher significantly (p<0.05) in parity-2 and parity ≥4 cows than that of parity-0, parity-1 and parity-3 cows. The pregnancy rate was also found higher in case of 4 to <5 years old cows than that of 2 to <3, 3 to <4, 5 to <6, and ≥6 years old. It may conclude that the hormonal regimen increases the pregnancy rate as well as decreases the undesired waiting of estrus and conception. Further study with more sample size will reveal the more effective treatment for cows at the coastal areas of Bangladesh.

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