Evaluation of the reanalysis wind over the Indian Ocean across the seasonal reversing wind pattern

75-84Present study show the similarity as well as contradictory event among the four different wind data based on monthly, seasonally and annual wind pattern over Indian Ocean. All the four reanalysis wind sources exhibit almost similar trend in their annual as well as monthly average wind pattern, however there is no strong similarity at their peak condition in space and time.The statistical analysis, based on Mean Absolute Error (MAE) and correlation coefficient (R), exhibited that the ECMWF and NCMRWF wind shows comparatively good agreement with the moored buoy data than the NCEP/NCAR and NCEP/CFSR wind under the seasonal reversing wind pattern occurs across the consecutive monsoons

A case study of coastal currents in relation with tides and winds in a tropical coastal waters of Vengurla, West Coast of India

Coastal currents consist of wind-driven, tidal, surface wave and geostrophic flows. These currents have a major role for nearshore sediment transport, but the measured data availability on coastal currents for the Indian coast is relatively less. This study analyze the variability of coastal currents along with the tides at nearshore and offshore waters during two different seasons (fag end of summer monsoon and initial stage of pre-monsoon) at Vengurla, west coast of India. Results of this study exhibited that the tides at Vengurla are mixed semi-diurnal dominated by solar constituent during summer monsoon (September to October); whereas the lunar constituents dominates during pre-monsoon (February to March). The nearshore current was dominated by the westward flow (sluggish current) during monsoon and south eastward flow during pre-monsoon, whereas the offshore flow (strong current) showed seasonality. At offshore, southerly current dominated during summer monsoon, whereas the northerly current played a major role during pre-monsoon. The current profile analysis at offshore revealed that the gradation of strong current at the surface to the sluggish nature of currents at the bottom and were comparatively higher during summer monsoon than pre-monsoon periods. This study revealed a complex pattern among winds, tides and currents at offshore

A case study of coastal currents in relation with tides and winds in a tropical coastal waters of Vengurla, West Coast of India

277-286Coastal currents consist of wind-driven, tidal, surface wave and geostrophic flows. These currents have a major role for nearshore sediment transport, but the measured data availability on coastal currents for the Indian coast is relatively less. This study analyze the variability of coastal currents along with the tides at nearshore and offshore waters during two different seasons (fag end of summer monsoon and initial stage of pre-monsoon) at Vengurla, west coast of India. Results of this study exhibited that the tides at Vengurla are mixed semi-diurnal dominated by solar constituent during summer monsoon (September to October); whereas the lunar constituents dominates during pre-monsoon (February to March). The nearshore current was dominated by the westward flow (sluggish current) during monsoon and south eastward flow during pre-monsoon, whereas the offshore flow (strong current) showed seasonality. At offshore, southerly current dominated during summer monsoon, whereas the northerly current played a major role during pre-monsoon. The current profile analysis at offshore revealed that the gradation of strong current at the surface to the sluggish nature of currents at the bottom and were comparatively higher during summer monsoon than pre-monsoon periods. This study revealed a complex pattern among winds, tides and currents at offshore

Impact of seasonal monsoon on coastal weather condition: a case study at Vengurla, west coast of India

2382-2389Study on coastal weather at Vengurla, west coast of India showed considerable seasonal climate variation. Diurnal variation of wind speed along with deviation of coastal breezes is gentle during pre- and post-monsoon periods. Coastal wind during summer monsoon period is dominated by remotely generated monsoon wind. Duration between setup and setdown of sea breeze event gradually extends from post-monsoon to pre-monsoon along with increasing trend in duration as well as strength of solar radiation and air temperature. During diurnal variation in pre- and post-monsoons, a reversal event occurs between relative humidity and coexisting air temperature. There was no considerable relation during summer monsoon seasons. The dramatic variation in the diurnal and seasonal atmospheric condition reveals the essential of annual time series data for local weather prediction

Deformation of textural characteristics and sedimentology along micro-tidal estuarine beaches

1432-1444Deformation in the textural characteristics of three selected beaches (Pavinkurve, Kundapura and Padukare) along Karnataka shoreline, west coast of India was examined. Study showed the beaches are significantly composed of unimodal to bimodal, fine to medium sand, moderately well sorted to moderately sorted, positive to negative skewed, and platykurtic to leptokurtic sediments. Spatio-temporal variation of mean grain size showed significant influence of breaking waves on beach sediments whereas sorting characteristics exhibited the impact of alongshore current on the intertidal sedimentary environment. Also very fine sands at gentle beach slope and very coarse sands at steeper slope exhibits the role of beach morphology on foreshore surface grains. The slow process of sediment removal/accumulation reveals a marginal variation in skewness and kurtosis characteristic and also exhibits a poor correlation in textural characteristics

Anticancer and anti-inflammatory activity and untargeted metabolite profiling by UPLC-ESI-QTOF of crude extracts of mangrove endophytic fungus <i>Aspergillus stellatus</i> LM-03

Mangrove ecosystem is diverse habitat for number of medicinally important microorganisms including fungi. Scientific research from last three decade emphasises it potential in important secondary metabolites production, which have wide biological activities. The current study elaborates isolation of fungi from pneumatophore of mangrove plant Avicennia marina and investigation of ethyl acetate extract for antimicrobial, anti-inflammatory and anticancer activity. Ethyl acetate extract of the fungus displayed maximum anti-inflammatory activity with 76.39% inhibition for by protein denaturation method and 22.52% inhibition for membrane stabilisation method with respect to standard ibuprofen. Further, the anticancer activity of Aspergillus stellatus LM-03 exhibited against MCF-7 of breast cancer cell with an IC50 value of 33.24 µg/ml. HPLC and UPLC-ESI-QTOF analysis displayed nine compound mainly alternariol monomethyl ether and methyl jasmonate, which are highly anticancer activity and moderate anti-inflammatory activity with other compounds as angelic anhydride, DL-3-(4-Hydroxyphenyl)lactic acid, 8,9-epoxyl-3-isobutyryloxy-10-(2-methylbutanoyl)thymol, 5-(6-methyl-7-oxooctyl) furan-2(5H)-one and phenyl-butyryl-glutamine with an unidentified compounds. The results of the current study indicate that it may be worthwhile to investigate Aspergillus stellatus LM-03 extract for promising bioactive metabolites with potential for medicinal use.</p