scholarly journals Nor’wester over West Bengal and comfortability

MAUSAM ◽  
2021 ◽  
Vol 58 (2) ◽  
pp. 177-188
Author(s):  
K. K. CHAKRABARTY ◽  
A. K. NATH ◽  
S. SENGUPTA
Keyword(s):  
Relative Humidity ◽  
West Bengal ◽  
Monsoon Season ◽  
Early Morning ◽  
Positive Aspect ◽  
Weather Factors ◽  
Thermal Index ◽  
The People ◽  
Tropical Areas ◽  
Weather Parameters

During the pre-monsoon months of March, April and May the weather over Kolkata is generally very uncomfortable due to high temperature and relative humidity. During this season Kolkata is affected by the nor’wester activity. Generally the nor’wester activity is defined as a disastrous weather activity and is locally called as ‘Kaalbaisakhi’ as it is ‘kaal’ or destruction during Bengali Baishakh (April-May) month over Bengal. However the downdraft associated with the nor’wester brings cool air and temperature sometimes drops by as much as 8 to 9 degree Celsius and the atmosphere becomes comfortable for some period. This is an entirely different and positive aspect of nor’wester.The human comfortability depends upon many weather parameters apart from human physiological parameters. However the primary weather factors are air temperature and relative humidity especially for tropical areas. Many authors have worked on this and the well accepted formula for thermal index THI or Discomfort Index DI is taken from Thom (1957,1958) which is a function of dry bulb and wet bulb temperature i.e., THI or DI = 0.4 (Ta + Tw) + 15 where temperature is in ºF and is 0.72 (Ta + Tw) + 40.6 where temperature is in ºC. Various stages of comfortability are classified viz., (i) Discomfortable (ii) Partial discomfortable and (iii) Comfortable. Neglecting the effect of wind and further simplifying the equation for DI as a function of (Ta + Tw) the range varies from 27 to 55 in increasing order of temperature.During the pre-monsoon months when the climate over Kolkata is very sultry and uncomfortable, people generally desire the onset of nor’wester for some temporary relief although it results into destruction. The nor’wester makes the weather comfortable after its occurrence and remains comfortable for 10 to 12 hours and some time even for a day. The present study is made taking six years data over Kolkata, both Alipore and Dum Dum. It is seen that except early morning of March the remaining period of pre-monsoon season is found to be uncomfortable climatologically. In the present study there were 91 occasions of squalls and it is found that most of the squalls occurred during the month of April and May and on most of the occasions nor’wester made the weather comfortable for a large part of the day in the month of April. By the end of May nor’wester activity also brought relief but not to that extent as in March and April to the people of Kolkata and neighbourhood.

Seasonal Incidence of Pulse Aphid (Aphis craccivora Koch.) and its Natural Enemies on Field Pea (Pisum sativum L.) in Relation to Some Abiotic Factors in Alluvial Zone of West Bengal

2021 ◽  
Author(s):  
S. Pal ◽  
S. Samanta ◽  
A. Banerjee
Keyword(s):  
Relative Humidity ◽  
Pisum Sativum ◽  
Natural Enemies ◽  
West Bengal ◽  
Insect Pests ◽  
Field Pea ◽  
Pest Population ◽  
Pisum Sativum L ◽  
Aphis Craccivora Koch ◽  
Weather Parameters

Background: Field pea, Pisum sativum L. is an important winter-season pulse crop. It is subjected to damage by both field and storage insect pests and approximately 10-15 per cent reduction in yield was reported due to the infestation of different insect pests. Among these, pulse aphid (Aphis craccivora Koch.) affects plant physiology directly by removal of nutrients or indirectly by dispersal of various viral diseases. The present investigation has been aimed to study the seasonal fluctuations of aphids and their natural enemies as well as their correlation. Another objective was to know the effect of various weather parameters on pulse aphids and their natural enemies which ultimately would be helpful to develop a forewarning model.Methods: The field experiment was conducted at the A-B Block Farm of Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal using two varieties of field pea (KPMR 935 and IFPD 122) during rabi seasons of two consecutive years of 2017-18 and 2018-19 following a Randomized Block Design with three replications. After recording the total population of both pests (nymphs and adults) and their natural enemies across the season, the mean population was worked out and used for correlation and regression studies along with the weather parameters. Result: Maximum aphid population was noticed during the peak pod formation stage of the crop irrespective of the varieties. The pest population was very strongly correlated with the incidence of coccinellid and ant population in both test varieties. Among the weather parameters, both maximum and minimum temperature and sunshine hour showed a positive correlation with the pest population and their natural enemies but relative humidity and rainfall showed a negative correlation. Regression studies indicated that temperature and relative humidity were the most influencing factors over the incidence of aphid in both the seasons.

scholarly journals Effect of weather factors and nitrogen application on nectar secretion and honey production potential in sunflower

2021 ◽  
Vol 22 (4) ◽  
pp. 457-468
Author(s):  
NAVDEEP KAUR ◽  
PARDEEP K. CHHUNEJA ◽  
JASPAL SINGH ◽  
AMIT CHOUDHARY ◽  
S.K. DHILLON
Keyword(s):  
Relative Humidity ◽  
Fertilizer Application ◽  
Soluble Solids ◽  
Nitrogen Application ◽  
Nectar Secretion ◽  
Production Potential ◽  
Weather Factors ◽  
Honey Production ◽  
Weather Parameters ◽  
Nectar Availability

Sunflower is a highly important bee floral crop. The nectar secretion governs this parameter and is greatly influenced by cultivar, environmental factors and fertilizer application. Studies were conducted at Punjab Agricultural University, Ludhiana on sunflower hybrids (PSH 996 and PSH 1962) sown on different dates (January 31, February 10, February 20 and March 2) with three levels of nitrogen (45, 60 and 75 kg ha-1). Delay in sowing from January 31 to March 2 caused significant reduction in nectar secretion (12.66%) and increase in its concentration (5.38%). The daily mean temperature had significant positive (R2 = 0.52 and 0.54) while mean relative humidity had negative (R2 = 0.55 and 0.37) correlation with nectar total soluble solids (TSS).Nectar secretion and its TSS increased significantly only at nitrogen dose of 60 kg ha-1 as compared to 45 kg ha-1.Weather parameters have more pronounced effects on TSSat 45 kg ha-1.Delay in sowing  by one month resulted in reduction in honey production potential by 1.5- 1.8 kg ha-1. In addition to this, the reduced nectar availability due to delay in sowing may negatively effect in attracting and sustaining pollinators’ populations and crop yield. 

scholarly journals Some climatological aspects of thunderstorms and squalls over Guwahati Airport

MAUSAM ◽  
2021 ◽  
Vol 57 (2) ◽  
pp. 231-240
Author(s):  
GAJENDRA KUMAR ◽  
M. MOHAPATRA
Keyword(s):  
Wind Speed ◽  
Relative Humidity ◽  
Frequency Distribution ◽  
Environmental Temperature ◽  
Environmental Changes ◽  
Monsoon Season ◽  
Early Morning ◽  
Maximum Wind ◽  
The Past ◽  
Average Maximum

Lkkj & xqokgkVh gokbZ vM~Ms ij vk, paMokr ls tqM+s okf"kZd vkSj ekfld ckjEckjrk dk forj.k] xtZ ds lkFk vk, rwQkuksa  vkSj paMokrksa ds vkjEHk gksus dk le; vkSj mudh vof/k rFkk i;kZoj.kh; ifjorZuksa dk fo’ys"k.k fd;k x;k gSA rwQku vkSj paMokr lcls T;knk ebZ ds eghusa esa vkrs gSa vkSj mlds ckn viSzy ds eghus esa vkrs gSaA rwQkuksa vkSj paMokrksa dh vko`fr;k¡ lcls T;knk ebZ ds eghusa esa gksrh gSa vkSj mlds ckn vizSy ds eghus esa gksrh gSaA vf/kdk¡’k rwQku ekulwu _rq ls iwoZ vkSj ekulwu _rq ds nkSjku vkrs gSa rFkk paMokr Qjojh ls ebZ ds eghuksa ds nkSjku vkrs gSaA ekulwu _rq ls iwoZ vkus okys vf/kdk¡’k rwQku e/; jkf= ls ysdj rM+ds lqcg ds le; esa vkrs gSa tcfd ekulwu _rq ds nkSjku vkus okys rwQku 0600&1200 ;w- Vh- lh- ds chp vk;k djrs gSa  vf/kdk¡’k rwQkuksa dh vof/k rhu ?kaVksa ls Hkh de dh gksrh gSA vf/kdk¡’k paMokrksa dh vof/k pkj feuVksa ls Hkh de dh gksrh gS] fn’kk mÙkj if’pe vkSj ;s 0900&2100 ;w- Vh- lh- ds le; vkrs gSaA xqokgkVh gokbZ vM~Ms ij paMokr ds vkus ls i;kZoj.kh; rkieku vkSlru 2-2° lsa- rd fxj tkrk gS] lkisf{kd vknzZrk 8-5 izfr’kr rd c<+ tkrh gS vkSj nkc 1-6 gSDVkikLdy rd c<+ tkrk gSA xqokgkVh gokbZ vM~Ms ij paMokr ds vkus ls vf/kdre iou xfr vkSlru yxHkx 39 ukWV~l gksrh gSA fiNys v/;;uksa ls rqyuk djus ij ;g irk pyrk gS fd fiNys dqN o"kksZa esa rQkuksa vkSj paMokrksa ds y{k.kksa esa fo’ks"k ifjorZu ugha vk;k gSA  The annual and monthly frequency distribution, time of commencement and duration of thunderstorms & squalls and environmental changes associated with occurrence of squall at Guwahati Airport have been analyzed. The frequencies of thunderstorms and squalls are maximum in the month of May followed by April. Most of the thunderstorms occur during premonsoon and monsoon season and squalls occur during Feb-May. Most of the premonsoon thunderstorms commence during midnight to early morning while the thunderstorms during monsoon season have preference to commence between 0600-1200 UTC. Majority of thunderstorms is of the duration of less than three hours. Majority of squalls have the duration of less than four minutes, direction as northwesterly and occur during 0900-2100 UTC. On the average, environmental temperature falls by 2.2° C, the relative humidity rises by 8.5%, and the pressure increases by 1.6 hPa due to squall over Guwahati Airport. The average maximum wind speed associated with a squall over Guwahati Airport is about 39 knots. Comparison with the past studies indicates that characteristics of thunderstorms and squalls have not changed significantly over the years.

The History Of Modern Vaccination In Cooch Behar State In The Nineteenth Century

2019 ◽  
Vol 5 (4) ◽  
pp. 180-190
Author(s):  
Rajkumar Bind
Keyword(s):  
Nineteenth Century ◽  
Vaccination Programme ◽  
West Bengal ◽  
The State ◽  
The People ◽  
Small Pox ◽  
Preventive Method ◽  
History Of

This paper examines the development of modern vaccination programme of Cooch Behar state, a district of West Bengal of India during the nineteenth century. The study has critically analysed the modern vaccination system, which was the only preventive method against various diseases like small pox, cholera but due to neglect, superstation and religious obstacles the people of Cooch Behar state were not interested about modern vaccination. It also examines the sex wise and castes wise vaccinators of the state during the study period. The study will help us to growing conciseness about modern vaccination among the peoples of Cooch Behar district.   

scholarly journals Seasonality of Non-SARS, Non-MERS Coronaviruses and the Impact of Meteorological Factors

Pathogens ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 187
Author(s):  
Olympia E. Anastasiou ◽  
Anika Hüsing ◽  
Johannes Korth ◽  
Fotis Theodoropoulos ◽  
Christian Taube ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Relative Humidity ◽  
Cloud Cover ◽  
Detection Rate ◽  
Logistic Regression Model ◽  
Meteorological Factors ◽  
Seasonal Pattern ◽  
Weather Factors ◽  
Immunosuppressed Patients ◽  
Immunocompetent Patients

Background: Seasonality is a characteristic of some respiratory viruses. The aim of our study was to evaluate the seasonality and the potential effects of different meteorological factors on the detection rate of the non-SARS coronavirus detection by PCR. Methods: We performed a retrospective analysis of 12,763 respiratory tract sample results (288 positive and 12,475 negative) for non-SARS, non-MERS coronaviruses (NL63, 229E, OC43, HKU1). The effect of seven single weather factors on the coronavirus detection rate was fitted in a logistic regression model with and without adjusting for other weather factors. Results: Coronavirus infections followed a seasonal pattern peaking from December to March and plunged from July to September. The seasonal effect was less pronounced in immunosuppressed patients compared to immunocompetent patients. Different automatic variable selection processes agreed on selecting the predictors temperature, relative humidity, cloud cover and precipitation as remaining predictors in the multivariable logistic regression model, including all weather factors, with low ambient temperature, low relative humidity, high cloud cover and high precipitation being linked to increased coronavirus detection rates. Conclusions: Coronavirus infections followed a seasonal pattern, which was more pronounced in immunocompetent patients compared to immunosuppressed patients. Several meteorological factors were associated with the coronavirus detection rate. However, when mutually adjusting for all weather factors, only temperature, relative humidity, precipitation and cloud cover contributed independently to predicting the coronavirus detection rate.

Transformasi Bentuk Pertunjukan Ronggeng Pasaman Grup Ganto Saroha Kecamatan Duo Koto Kabupaten Pasaman

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Kurniawan Fernando ◽  
Martarosa Martarosa ◽  
Awerman Awerman
Keyword(s):  
Local Government ◽  
Young People ◽  
Qualitative Methods ◽  
Early Morning ◽  
Analytic Description ◽  
Great Demand ◽  
The People ◽  
Keyboard Music ◽  
West Sumatra ◽  
Form Transformation

<p align="center"><strong><em>Abstract</em></strong></p><p><em>This study aims to determine the transformation of the Ronggeng Pasaman performance of the Ganto Saroha group in Duo Koto District, Pasaman Regency. Ronggeng Pasaman is a performance art consisting of pantun, joget, and music, especially in Simpang Tonang, Pasaman, West Sumatra. The form of the Ronggeng Pasaman show is combining bouncing skills while dancing to the accompaniment of violin and drum music. The show starts at night, and ends until early morning. Currently Ronggeng Pasaman has undergone a transformation, people, especially young people, are less interested and begin to leave their regional arts, so the Ronggeng Pasaman show is rarely displayed. There was anxiety from the artists themselves, then initiatives emerged to attract the attention of the people. So it formed the Ronggeng Pasaman Ganto Saroha group, with the addition of keyboard music instruments in the show. Unlike the Pasaman Ronggeng Performance in general, the Ganto Saroha group does not show male singers with female appearance, but rather singers are real women or men. This study uses qualitative methods, is analytic description, observant participants. The results showed that the transformation carried out by the artists, made the Ronggeng Pasaman performance of the Ganto Saroha group well received and in great demand by all people in Pasaman, and was fully supported by the local government.</em></p><p><strong><em>Keywords : </em></strong><em>Form Transformation, Pasaman Ronggeng Performance, Ganto Saroha Group</em></p><p align="center"><strong><em>Abstrak</em></strong></p><p><em>Penelitian ini bertujuan untuk mengetahui transformasi bentuk pertunjukan Ronggeng Pasaman grup Ganto Saroha di Kecamatan Duo Koto, Kabupaten Pasaman. Ronggeng Pasaman merupakan seni pertunjukan  terdiri dari pantun, joget, dan musik, khususnya terdapat di Simpang Tonang, Pasaman, Sumatera Barat. Bentuk pertunjukan Ronggeng Pasaman adalah menggabungkan keahlian berpantun sambil menari dengan iringan musik biola dan gendang. Pertunjukan dimulai pada malam hari, dan berakhir hingga menjelang pagi. Saat ini Ronggeng Pasaman telah mengalami transformasi, masyarakat khususnya anak muda kurang meminati dan mulai meninggalkan kesenian daerahnya, sehingga pertunjukan Ronggeng Pasaman jarang ditampilkan. Terdapat keresahan dari diri seniman, kemudian muncul inisiatif untuk menarik kembali perhatian masyarakatnya. Sehingga dibentuk grup Ronggeng Pasaman Ganto Saroha, dengan penambahan instrument musik keyboard dalam pertunjukannya. Beda dengan Pertunjukan Ronggeng Pasaman  pada umumnya, grup Ganto Saroha tidak menampilkan penyanyi laki-laki berpenampilan perempuan, melainkan penyanyi adalah perempuan atau laki-laki sesungguhnya. Penelitian ini menggunakan metode kualitatif, bersifat deskripsi analitik, partisipan observan. Hasil penelitian menunjukkan bahwa transformasi yang dilakukkan para seniman, membuat pertunjukan Ronggeng Pasaman grup Ganto Saroha diterima dengan baik  dan diminati semua kalangan masyarakat Pasaman, dan  didukung penuh oleh pemerintahan setempat.</em></p><strong><em>Kata kunci : </em></strong><em>Transformasi Bentuk, Pertunjukan Ronggeng Pasaman, Grup Ganto Saroha</em>

scholarly journals Reproductive performance of spiralling whitefly on guava and impact of weather parameters on its immature stages

2018 ◽  
Vol 15 (2) ◽  
pp. 207-214
Author(s):  
I Hossain ◽  
MMH Khan ◽  
SMH Jahan
Keyword(s):  
Relative Humidity ◽  
Negative Correlation ◽  
Reproductive Performance ◽  
Significant Positive Correlation ◽  
Instar Nymph ◽  
Maximum Temperature ◽  
Immature Stages ◽  
Positive Correlation ◽  
Aleurodicus Dispersus ◽  
Weather Parameters

The study was conducted to know the reproductive performance of spiralling whitefly on guava. Number of colony, eggs, 1st instar, 2nd instar, 3rd instar and 4th instar nymphs per five leaves ranged from 6 to 15, 8 to 32, 0 to 44, 0 to 22, 0 to 45 and 0 to 28, respectively. Maximum number of adults and nymphs were found in the month of January. Highest longevity of Aleurodicus dispersus (21.5 days) was recorded in adult while the lowest was in 2nd instar nymph (6.4 days). The number of colony/leaf and number of 3rd and 4th instar nymphs of A. dispersus had significant positive correlation with minimum and maximum temperature while non-significant positive correlation is observed between the number of egg/colony, the number 1st and 2nd instar nymphs with minimum and maximum temperature. A. dispersus showed nonsignificant positive correlation with minimum and maximum relative humidity regarding number of colony/leaf, 2nd instar nymph while nonsignificant negative correlation with 4th instar nymph.SAARC J. Agri., 15(2): 207-214 (2017)

scholarly journals Weather parameters vulnerability on tea production in north western Himalaya, India

2016 ◽  
Vol 8 (4) ◽  
pp. 2262-2267
Author(s):  
Parmod Verma ◽  
Ranbir Singh Rana ◽  
Ramesh Ramesh ◽  
Ranu Pathania
Keyword(s):  
Relative Humidity ◽  
Minimum Temperature ◽  
Positive Relationship ◽  
Western Himalaya ◽  
Green Leaf ◽  
Maximum Temperature ◽  
Leaf Yield ◽  
Tea Production ◽  
Weather Parameters ◽  
June July

The study assessed the sensitivity of weather parameters with respect to total green leaf and two leaves and bud (T & B) productivity of tea crop {Camellia sinensis (L.) Kuntze}. The maximum temperature ranging from 20.0 to 29.0 oC during March, May, August and September showed positive relationship with values ranging from 0.26 to 3.38 and 0.22 to 3.22 for green leaf and T & B yield, respectively. Similarly, minimum temperature ranging from 9.1 to 20.0 oC during March and July to October found positive 0.001 to 2.93 and 0.28 to 2.91 for green leaf and T & B productivity, respectively. The mean monthly rainfall amounting 52.7 to 664.7 mm during March, May, July to October and 52.7 to 488.4 mm during June, July, September and October also showed positive sensitivity with values ranging from 0.03 to 0.33 and 0.007 to 0.35 for green leaf and T & B yield, respectively. The relative humidity ranging between 41.2 to 77.3% during April to May for green leaf yield (0.32 to 1.71) and during April to May and October for two leaf and bud yield (0.00 to 1.70) showed positive relationship. So, maximum and minimum temperature between 20.0 to 29.0 oC and 9.1 to 20.0 oC, respectively with rainfall of 52.7 to 488.4 mm and relative humidity 41.2 to 77.3% are the most beneficial weather parameters for tea cultivation at Palampur conditions.

scholarly journals Impact of Weather Factors on Coelaenomenodera elaiedis MLK (Coleoptera: Chrysomelidae) in Nigeria

2020 ◽  
pp. 115-128
Author(s):  
Aneni T. I. ◽  
Adaigbe V. C. ◽  
Ogbebor C. O. ◽  
Okere C. I. ◽  
Aghayedo C. O.
Keyword(s):  
Relative Humidity ◽  
Oil Palm ◽  
Insect Pests ◽  
Leaf Miner ◽  
Weather Factors ◽  
Fresh Fruit Bunch ◽  
Major Pest ◽  
Model Equations ◽  
Main Station ◽  
Mathematical Relationships

The leaf miner (Coelaenomenodera elaeidis) is a major pest of the oil palm. It breaks out in epidemic proportions periodically, resulting in severe leaf defoliation and consequently low fresh fruit bunch (FFA) yield. This study analyses temperature, rainfall, relative humidity, and leaf miner abundance records sampled in oil palm fields between 1976 and 1980 in the main station of the Nigerian Institute for Oil Palm Research (NIFOR). Data for temperature, rainfall, and relative humidity were obtained from NIFOR meteorological station. Mathematical relationships between the insect stages (larva, pupa, and adult) and weather factors (rainfall and temperature) were developed indicating that pest predictions can be made for different leaf miner stages using their corresponding model equations giving specific values for rainfall and temperature. Variations in the seasonal patterns of temperature and rainfall are of major significance as a cue to timing leaf miner abundance and would help in making better decisions regarding where farmer action can target pest control interventions, thereby contributing to ensure food security. The need for continuous monitoring has great potential for detection and control of insect pests in oil palm growing areas.

scholarly journals Studies on fish diversity concerning Hydro-ecology of Kangsabasti river in Purulia district, West Bengal, India

2020 ◽  
Vol 26 (2) ◽  
Author(s):  
Manab Kumar Saha
Keyword(s):  
Fish Species ◽  
Physicochemical Parameters ◽  
West Bengal ◽  
Monsoon Season ◽  
Fish Diversity ◽  
Riverine Ecosystem ◽  
Post Monsoon ◽  
Fish Catch ◽  
Purulia District

Fish diversity depends both on various physicochemical parameters and the biological components of the riverine ecosystem. During the study period from January 2017 to December 2019 the highest fish diversity and density were observed in post-monsoon and lowest in pre-monsoon season in the Kangsabati River, Purulia District of West Bengal. Twenty five fish species, associated with 19 genera, 10 families and 5 orders have been identified. It was recorded that the Cyprinidae was the predominant family, which represented 56% of the entire fish catch.

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