scholarly journals Influence of winds on temporally varying short and long period gravity waves in the near shore regions of Eastern Arabian Sea

2012 ◽  
Vol 9 (5) ◽  
pp. 3021-3047
Author(s):  
J. Glejin ◽  
V. Sanil Kumar ◽  
T. N. Balakrishnan Nair ◽  
J. Singh
Keyword(s):  
West Coast ◽  
Sea Breeze ◽  
Monsoon Period ◽  
West Coast Of India ◽  
Intermediate Period ◽  
Long Period ◽  
Post Monsoon ◽  
South West ◽  
South West Monsoon ◽  
West Monsoon

Abstract. Wave data collected off Ratnagiri, west coast of India during 1 May 2010 to 30 April 2012 is used in the study. Seasonal and annual variation in wave data controlled by the local wind system such as sea breeze and land breeze, and remote wind generated long period waves observed along the west coast of India, is studied. Sea breeze plays an important role in determining the sea state during pre and post monsoon seasons and the maximum wave height is observed during peak hours of sea breeze at 15:00 UTC. Long period waves (peak period over 13 s) are observed mainly during the pre and the post monsoon season. Maximum peak period observed during the study is 22 s and is in the month of October. Long period waves observed during the south west monsoon period of 2011 are identified as swell propagated from the Southern Ocean with an estimated travelling time of 5–6 days. The swells reaching the Arabian Sea from the South Indian Ocean and Southern Ocean, due to storms during the pre and post monsoon periods will modify the near surface winds, due to the dominant wave induced wind regime. Energy spectrum of observed waves indicates onset and decline of strong south west monsoon winds. Convergence of energy-containing frequency bands corresponding to short period waves (Tp < 8 s) and long period waves (Tp > 13 s) to intermediate period waves (8 < Tp < 13 s) are observed at the end of the pre monsoon season; divergence is observed during the start of the post monsoon period from intermediate period waves to short period waves and long period waves. South west monsoon period is characterized by the energy corresponding to the frequency band of intermediate period waves along the west coast of India.

Recurrent landslides in Southern Western Ghats, India: A changing environmental perspective

2021 ◽  
Author(s):  
Asokan Laila Achu ◽  
Girish Gopinath
Keyword(s):  
Western Ghats ◽  
Hot Spot ◽  
Extreme Rainfall ◽  
Vital Role ◽  
Monsoon Period ◽  
Extreme Rainfall Events ◽  
South West ◽  
South West Monsoon ◽  
West Monsoon ◽  
The Western Ghats

&lt;p&gt;The Western Ghats (WG), an elevated passive continental margin along the southwestern coast of India, is the most widely populated biodiversity hot spot in the world. Monsoon climate is prevalent throughout the length of the Western Ghats. The WG region is prone to the occurrence of various hydro-climatic disasters such as extreme rainfall-driven floods and landslides. During the past 100 years, landslides and floods caused by extreme rainfall events in the WG have occurred in 1924 and 1979; but the most disastrous event, in terms of area of impact, loss of life and economic impact, occurred in August 2018. Generally, the south-west monsoon (Indian summer monsoon) occurs in the first week of June and extends up to September and the Indian Meteorological Department (IMD) predicted above-normal rainfall of 13% during the month of August 2018. But the State received an excess of 96% during the period from 1st to 30th August 2018, and 33% during the entire monsoon period till the end of August. The unprecedented heavy rains, storms, floods and associated thousands of landslides have caused exorbitant losses including 400 life losses, over 2.20 lakh people were displaced, and 20000 homes and 80 dams were damaged or destructed. This study aimed to elucidate the reasons behind the thousands of landslides caused in WG using observed and field evidences. Changes in south-west monsoon pattern and rainfall intensity played a vital role in the occurrence of landslides in WG. Further, the extensive causalities are the result of anthropogenic disturbances including landscape alterations and improper landuse practices in the hilly tracks of WG. The major causative factors for series of landslides in various segments of WG is due to hindrance of lower order streams/springs, vertical cutting, intensive quarrying, unscientific rain pits &amp; man-made structures together with erratic rainfall triggered major and minor landslides in various segments of WG. The present investigation concludes that a scientific landuse policy and geoscientific awareness is essential to mitigate the environment.&lt;/p&gt;

Comparative studies on role of micro environmental factors onlactation length of Deoni cattle in their breeding areas

2016 ◽  
Author(s):  
B. N. Thorat ◽  
B. M. Thombre ◽  
A. T. Shinde
Keyword(s):  
Climatic Factors ◽  
Monsoon Season ◽  
Cold Season ◽  
Post Monsoon ◽  
Lactation Length ◽  
South West ◽  
South West Monsoon ◽  
Post Monsoon Season ◽  
Sources Of Variation ◽  
West Monsoon

In the present study pedigree records maintained at Cattle Cross Breeding Project, VNMKV, Parbhani (Maharashtra) for the period of 1995-2010 were utilized to study correlation of lactation length and climatic factors. The climatic parameters considered were temperature, relative humidity, wind velocity, sunshine hours and dry and wet bulb temperature along with THI. The data on monthly lactation length of cows calved during cold, hot, south-west monsoon and post monsoon seasons were considered. Correlation and multiple regression analysis was used to investigate various sources of variation in monthly lactation length. Monthly lactation length data were analyzed to ascertain the effect of climatic attributes and to know their association with lactation lengths. The average monthly lactation length was recorded as 220.21 + 6.75 days in Deoni cattle. It can be inferred that maximum lactation length was recorded during post monsoon season (240.94 + 11.26 days) followed by south-west monsoon season (222.28 + 9.00 days), cold season (218.67 + 8.25 days) and hot season (198.95 + 10.71 days), respectively..

Seasonal foraging activity of stingless bee Tetragonula travancorica Shanas and Faseeh (Hymenoptera: Apidae: Meliponini)

ENTOMON ◽  
2021 ◽  
Vol 46 (2) ◽  
pp. 149-166
Author(s):  
Lincy Abraham ◽  
S. Shanas
Keyword(s):  
Weather Conditions ◽  
Southwest Monsoon ◽  
Stingless Bee ◽  
Foraging Activity ◽  
Monsoon Period ◽  
North East ◽  
South West ◽  
South West Monsoon ◽  
Two Peaks ◽  
West Monsoon

The foraging hive activity of stingless bee Tetragonula travancorica Shanas and Faseeh was studied from November 2018 to August 2019. The activity varied between the seasons, weather conditions and time hours of study. The outgoing and incoming pollen foragers exhibited two peaks in activity, from 0800-1200 h (first) and during 1500-1600 h (second). The activity of incoming non-pollen foragers displayed only one distinct peak between 1000-1200 h except during the southwest monsoon period. The greatest activity was recorded during the dry season (January-May), followed by the south-west monsoon (June-August) and north-east monsoon (November- December) seasons. Maximum overall activity was recorded during hotter months February, March and April while the lowest was observed in January and December. At any season or time, the number of incoming foragers without pollen was greater than pollen foragers.

Studies on effect of climatic parameters on monthly lactation milk yields in Deoni cattle of Maharashtra, India

2015 ◽  
Author(s):  
B. N. Thorat ◽  
B. M. Thombre ◽  
S. G. Narwade
Keyword(s):  
Heat Stress ◽  
Milk Production ◽  
Climatic Factors ◽  
Monsoon Season ◽  
Production Performance ◽  
Climatic Parameters ◽  
Post Monsoon ◽  
South West ◽  
South West Monsoon ◽  
West Monsoon

Improvement in production performance of indigenous cattle breeds becomes essential to make them economically viable. Due to increased environmental temperature cattle undergo heat stress. Milk production is adversely affected due to heat stress. In the present study records maintained at Cattle Cross Breeding Project, Vasantrao Naik Marathawada Krishi Vidyapeeth, Parbhani (Maharashtra) for the period of 1995-2010 were utilized to study monthly lactation milk yields and climatic factors. The climatic parameters considered were temperature, relative humidity, wind velocity, sunshine hours and dry and wet bulb temperature along with THI. The data on monthly lactation milk yields of cows calved during cold, hot, south-west monsoon and post monsoon seasons were considered. Correlation and multiple regression analysis were used to investigate various sources of variation in monthly lactation milk yields. Monthly lactation milk yield data were analyzed to ascertain the effect of climatic attributes and to know their association with monthly lactation milk yields. The higher milk production during post monsoon was attributed to cows calved during that season whose milk production was favoured by post monsoon climate. Seasonal climate may be the responsible factor to influence the milk production levels. The average monthly milk production (359.18+25.85 liter) was more during post monsoon season followed by cold (326.81+20.48 liter), south-west monsoon seasons (326.60 +20.45 liter) and hot (245.78+19.13 liter), respectively.

Influence of season on peak milk yield in Deoni breed of cattle in marathwada region of Maharastra state, India

2015 ◽  
Author(s):  
B. N. Thorat ◽  
B. M. Thombre ◽  
D. V. Bainwad ◽  
S. S. Bhutkar
Keyword(s):  
Milk Yield ◽  
Monsoon Season ◽  
Cold Season ◽  
Yield Data ◽  
Post Monsoon ◽  
South West ◽  
South West Monsoon ◽  
Post Monsoon Season ◽  
Different Seasons ◽  
West Monsoon

In the present investigation the sixteen years data (1995-2010) on daily peak milk yield of cows calved during cold, hot, south-west monsoon and post monsoon season each for twelve month in year and climatic attributes like temperature (maximum and minimum), humidity (maximum and minimum), sunshine hours and temperature humidity Index during corresponding period were collected. Daily peak milk yield data were analyzed statistically to see the effect of climatic attributes and to know their association with peak milk yield. Generally post monsoon climatic condition favours the milk production in animals due to pleasant climate and availability of quality fodder. The average daily peak milk yield of Deoni cows was 2.60 kg. It could be inferred that apart from availability of quality nutritious fodder during different seasons, maximum peak milk yield was recorded during post monsoon season followed by south-west monsoon season, cold season and hot season respectively.

scholarly journals Mortality and morbidity pattern in goats under organized farm conditions of Kerala

2021 ◽  
Vol 52 (2) ◽  
Author(s):  
Chandran Deepak ◽  
P. M. Rojan ◽  
R. Venkatachalapathy Thirupathy ◽  
A. S. Lejaniya
Keyword(s):  
Study Data ◽  
Mortality Pattern ◽  
Mortality And Morbidity ◽  
Post Monsoon ◽  
South West ◽  
South West Monsoon ◽  
Goat Population ◽  
Causes Of Mortality ◽  
West Monsoon ◽  
Effect Of Age

A study was undertaken to find out the morbidity and mortality pattern in the goat population of Kerala. Factors such as cause, age, sex, breed, season and year were included in the study. Data were collected from 3925 goats maintained at The Goat and Sheep Farm, KVASU, Mannuthy for six years from 2011 to 2017 to assess the effect of different factors. Data pertaining to 2649 goats from 2013 to 2017 were analysed to find out the morbidity pattern among goats. The overall mortality rate was 11.76 per cent. Among the various causes of mortality, the results of this study indicated that mortality due to enteritis was the highest (40.60 %) followed by that due to pneumonia (22.88%) and acidosis (10.40%). The effect of age, season, sex and year on goat mortality were significant (p<0.05). Mortality was the highest in the age group of 0.-3 months followed by 3-6 months. The incidence of mortality rates were 4.67, 5.09 5.27 and 5.26 per cent in pre-monsoon, south-west monsoon, post-monsoon and winter respectively. Mortality was more in females (64.11%) than males. Mortality was highest in cross bred goats followed by Malabari and Attappady black, but not significant. The proportional morbidity due to foot rot was the highest (35.28%) followed by enteritis (16.03%) and orf (7.65%). Highest morbidity was observed during south west monsoon (45.55%) followed by post monsoon (21.98%) and pre monsoon (18.14%). The results of this study suggest that proper management during first three months of age especially during south west monsoon was critical to minimise mortality among goats.

Sign in / Sign up

Export Citation Format

Share Document