scholarly journals Seasonal Variation of Leaf Dust Accumulation and Biochemical Parameters of Selected Plant Species Alongside the National Highway-7 in Sirmaur, H.P, India

2017 ◽  
Vol 12 (2) ◽  
pp. 421-428
Author(s):  
Jyotsana Pandit ◽  
Anil Sood ◽  
Satish Bhardwaj ◽  
Anish Sharma
Keyword(s):  
Seasonal Variation ◽  
Plant Species ◽  
Biochemical Parameters ◽  
Monsoon Season ◽  
Dust Deposition ◽  
Shorea Robusta ◽  
National Highway ◽  
Post Monsoon Season ◽  
Woodfordia Fruticosa ◽  
Dust Accumulation

The present study was carried out to assess the dust interception efficiency and impact of dust deposition on biochemical parameters of plant species growing alongside National Highway (NH-7) at Sirmaur, H.P, India. Plants are universal sink of CO2. The plant species selected for the study were Ficus roxburghii, Mallotus philippensis, Shorea robusta, Woodfordia fruticosa. The observed trend of dust accumulation was in the order Ficus roxburghii (38.30 mg m-2) > Shorea robusta (26.94 mg m-2),> Mallotus philippensis (22.31 mg m-2) > Woodfordia fruticosa (16.70 mg m-2). The present study revealed, that the leaf dust accumulation decreased with increasing distance from the national highway. Leaf dust accumulation was influenced by the seasons of the year with the maximum (30.70) in pre-monsoon and the minimum(21.42) in post-monsoon season.

scholarly journals Seasonal variation and light absorption property of carbonaceous aerosol in a typical glacier region of the southeastern Tibetan Plateau

2018 ◽  
Vol 18 (9) ◽  
pp. 6441-6460 ◽  
Author(s):  
Hewen Niu ◽  
Shichang Kang ◽  
Hailong Wang ◽  
Rudong Zhang ◽  
Xixi Lu ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
East Asia ◽  
Climate Model ◽  
Monsoon Season ◽  
Photochemical Reactions ◽  
Carbonaceous Aerosol ◽  
Carbonaceous Aerosols ◽  
Near Surface ◽  
Post Monsoon ◽  
Post Monsoon Season

Abstract. Deposition and accumulation of light-absorbing carbonaceous aerosol on glacier surfaces can alter the energy balance of glaciers. In this study, 2 years (December 2014 to December 2016) of continuous observations of carbonaceous aerosols in the glacierized region of the Mt. Yulong and Ganhaizi (GHZ) basin are analyzed. The average elemental carbon (EC) and organic carbon (OC) concentrations were 1.51±0.93 and 2.57±1.32 µg m−3, respectively. Although the annual mean OC ∕ EC ratio was 2.45±1.96, monthly mean EC concentrations during the post-monsoon season were even higher than OC in the high altitudes (approximately 5000 ma.s.l.) of Mt. Yulong. Strong photochemical reactions and local tourism activities were likely the main factors inducing high OC ∕ EC ratios in the Mt. Yulong region during the monsoon season. The mean mass absorption efficiency (MAE) of EC, measured for the first time in Mt. Yulong, at 632 nm with a thermal-optical carbon analyzer using the filter-based method, was 6.82±0.73 m2 g−1, comparable with the results from other studies. Strong seasonal and spatial variations of EC MAE were largely related to the OC abundance. Source attribution analysis using a global aerosol–climate model, equipped with a black carbon (BC) source tagging technique, suggests that East Asia emissions, including local sources, have the dominant contribution (over 50 %) to annual mean near-surface BC in the Mt. Yulong area. There is also a strong seasonal variation in the regional source apportionment. South Asia has the largest contribution to near-surface BC during the pre-monsoon season, while East Asia dominates the monsoon season and post-monsoon season. Results in this study have great implications for accurately evaluating the influences of carbonaceous matter on glacial melting and water resource supply in glacierization areas.

scholarly journals Seasonal Variation in Groundwater Quality of Yavatmal District, India

2011 ◽  
Vol 8 (2) ◽  
pp. 870-874
Author(s):  
P. N. Rajankar ◽  
D. H. Tambekar ◽  
S. R. Wate
Keyword(s):  
Water Quality ◽  
Seasonal Variation ◽  
Groundwater Quality ◽  
Monsoon Season ◽  
Quality Standards ◽  
Water Quality Standards ◽  
Percolation Process ◽  
Post Monsoon Season ◽  
Different Parts

Seventy samples of groundwater were collected from different parts of Yavatmal District, India and analyzed. The results of this analysis were compared with the WHO water quality standards. The groundwater quality in this district showed slightly seasonal variation while the data computed in Water Quality Index (WQI) calculator. The WQI was varied from 73.0 to 80.2 during pre monsoon and 68.7 to 72.4 in post monsoon season, which showed slightly seasonal variation. This may be attributed to surface runoff and percolation process. The results showed that, the water in these areas are bacteriologically not safe and need treatment before it is used for drinking.

scholarly journals Determination of Leaf Dust Accumulation on Certain Plant Species Grown Alongside National Highway- 22, India

2016 ◽  
Vol 11 (1) ◽  
pp. 77-82 ◽  
Author(s):  
Navjot Singh ◽  
S. K Bhardwaj ◽  
K. S Pant ◽  
T. S Rai
Keyword(s):  
Plant Species ◽  
Surface Characteristics ◽  
Melia Azedarach ◽  
Uniform Size ◽  
The Road ◽  
Time Period ◽  
National Highway ◽  
Toona Ciliata ◽  
Grewia Optiva ◽  
Dust Accumulation

Vehicular traffic is one of the major contributors to accumulate dust on plants grown alongside roads. Plants intercept tons of dust, absorb noise and serve as acoustic screens on busy highways. Vegetation contributes in reducing dust concentration in environment by acting as a sink for air pollutants. Taking this into account, the present study was conducted on National highway- 22 from Parwanoo to Solan, falling in Solan district of Himachal Pradesh, India. Specifically, four plant species namely Grewia optiva Drummond ex Burret, Toona ciliata M. Roem, Melia azedarach L. and Woodfordia floribunda (L.) Kurz of uniform size, age, spread and common in occurrence on both sides of the highway were selected for the study. Dust accumulation on leaves of selected plants was estimated during three main seasons (Rainy, Winter and Summer) of the year. Samples were collected from two horizontal distances (0-5 m and 5-10 m) from both sides of the road. Results showed that dust accumulation on the leaves ranged from 0.0083 g m-2 in T. ciliata to 0.0597 g m-2 in G. optiva and followed the descending order G. optiva > W. floribunda > M. azedarach > T. ciliata. Season wisethe examined plant species followed the descending order winter > summer > rainy season. Plants grown at a distance of 0-5 m accumulated higher dust on their leaves as compared to 5-10 m distance from the road. Due to surface characteristics of twigs, bark and foliage of the plants particulate matters are captured by them and remain there for extended time period. From the results of this study, it could be inferred that the air quality in urban/ arid areas can be improved by planting firstly the species G. optiva and W. floribunda along road sides of similar highways to national highway-22.

scholarly journals Effect of temperature on the occurrence of Desmids in a lentic water body of Bhopal district, M.P. with reference to seasonal variation in the physico- chemical parameters

2014 ◽  
Vol 15 (3) ◽  
pp. 89-93
Author(s):  
Bhawana Agrawal ◽  
Pramod Patil
Keyword(s):  
Seasonal Variation ◽  
Water Body ◽  
Monsoon Season ◽  
Winter Season ◽  
Summer Season ◽  
Effect Of Temperature ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
Post Monsoon Season ◽  
Lentic Water

The aim of the study was to assess the effect of temperature on the occurrence of desmids on a lentic waterbody viz. Jawahar Bal Udhyan Pond situated in northern direction of the Bhopal district with reference to its seasonal variation in physico-chemical parameters. Water temperature of the lentic water body varied between 16.2°C to 31.9°C in winter and summer season respectively. During the present study period a total of 18 desmid taxa of 6 genera were encountered in which Cosmarium dominated in terms of species diversity. Desmids occurred maximum in winter season i.e., from December to February and minimum in post monsoon season i.e., from October and November. Different species of Closterium, Euastrum, Staurastrum, Pleurotaenium, and Sphaerozosma are considered as pollution tolerant species and the presence of all these species and result of physico-chemical parameters indicates the meso-eutrophic condition of the waterbody.

scholarly journals Assessment of Trophic Responses of a Reservoir to Seasonal and Annual Variations in Monsoon

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2117
Author(s):  
Su-mi Kim ◽  
Hyun-su Kim
Keyword(s):  
Water Quality ◽  
Trophic State ◽  
Monsoon Season ◽  
Phytoplankton Growth ◽  
Phosphorus Loading ◽  
Nutrient Concentrations ◽  
Trophic State Index ◽  
Post Monsoon ◽  
Post Monsoon Season ◽  
State Index

The variations in water quality parameters and trophic status of a multipurpose reservoir in response to changing intensity of monsoon rain was investigated by applying a trophic state index deviation (TSID) analysis and an empirical regression model to the data collected in two periods from 2014 to 2017. The reservoir in general maintained mesotrophic conditions, and Carlson’s trophic state index (TSIc) was affected most by TSITP. Nutrient concentrations, particularly phosphorus, did not show strong correlations with precipitation, particularly in the period with weak monsoon, and a significant increase in total phosphorus (TP) was observed in Spring 2015, indicating the possibility of internal phosphorus loading under decreased depth and stability of water body due to a lack of precipitation. TSIChl was higher than TSISD in most data in period 1 when a negligible increase in precipitation was observed in the monsoon season while a significant fraction in period 2 showed the opposite trend. Phytoplankton growth was not limited by nutrient limitation although nutrient ratios (N/P) of most samples were significantly higher than 20, indicating phosphorus-limited condition. TSID and regression analysis indicated that phytoplankton growth was limited by zooplankton grazing in the Spring, and that cell concentrations and community structure in the monsoon and post-monsoon season were controlled by the changing intensity of the monsoon, as evidenced by the positive and negative relationships between community size and cyanobacterial population with the amount of precipitation in the Summer, respectively. The possibility of contribution from internal loading and an increase in cyanobacterial population associated with weak monsoon, in addition to potential for nutrient enrichment in the post-monsoon season, implies a need for the application of more stringent water quality management in the reservoir that can handle all potential scenarios of eutrophication.

scholarly journals Low CO2 evasion rate from the mangrove-surrounding waters of the Sundarbans

2021 ◽  
Author(s):  
Anirban Akhand ◽  
Abhra Chanda ◽  
Kenta Watanabe ◽  
Sourav Das ◽  
Tatsuki Tokoro ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Dissolved Inorganic Carbon ◽  
Monsoon Season ◽  
Buffering Capacity ◽  
Marine Water ◽  
High Temporal Resolution ◽  
Post Monsoon Season ◽  
Biogeochemical Parameters ◽  
Northern Bay Of Bengal ◽  
The Sundarbans

AbstractGlobally, water bodies adjacent to mangroves are considered significant sources of atmospheric CO2. We directly measured the partial pressure of CO2 in water [pCO2(water)] and related biogeochemical parameters with high temporal resolution, covering both diel and tidal cycles, in the mangrove-surrounding waters around the northern Bay of Bengal during the post-monsoon season. Mean pCO2(water) was marginally oversaturated in two creeks (470 ± 162 µatm, mean ± SD) and undersaturated in the adjoining estuarine stations (387 ± 58 µatm) compared to atmospheric pCO2, and was considerably lower than the global average. We further estimated the pCO2(water) and buffering capacity of all possible sources of the mangrove-surrounding waters and concluded that their character as a CO2 sink or weak source is due to the predominance of marine water from the Bay of Bengal with low pCO2 and high buffering capacity. Marine water with high buffering capacity suppresses the effect of pCO2 increase within the mangrove system and lowers the CO2 evasion even in creek stations. The δ13C of dissolved inorganic carbon (DIC) in the mangrove-surrounding waters indicated that the DIC sources were a mixture of mangrove plants, pore-water, and groundwater, in addition to marine water. Finally, we showed that the CO2 evasion rate from the estuaries of the Sundarbans is much lower than the recently estimated world average. Our results demonstrate that mangrove areas having such low emissions should be considered when up-scaling the global mangrove carbon budget from regional observations.

Population and Group Size of Cheer Pheasant Catreus Wallichii in Pokhari Valley, Garhwal Himalaya, India

2021 ◽  
Vol 9 (VII) ◽  
pp. 3503-3505
Author(s):  
Manish Kukreti
Keyword(s):  
Population Dynamics ◽  
Seasonal Variation ◽  
Group Size ◽  
Monsoon Season ◽  
Garhwal Himalaya ◽  
Spring Season ◽  
Maximum Value ◽  
Minimum Group

Present paper reports population dynamics of Cheer pheasant Catreus wallichii in Pokhari valley, Garhwal Himalaya during January 2019 to December 2019. A total of 405 individuals with 145 groups were recorded. Overall individuals per sighting and group size (3.88±0.51 and 3.40±0.45) were also recorded during the study period respectively. Maximum value of individuals per sighting and group size were recorded in months of July and November (6.13±0.76 and 7.32±0.97), while minimum were recorded in May and April (1.75±0.27 and 1.17±0.26). Seasonal variation was also observed in population and group size. Maximum value of individual per sighting was recorded during the Monsoon season and minimum were recorded in spring season. While maximum and minimum group size were recorded in winter and spring Season.

A Study on Prevalence and Seasonal Distribution of Dengue at a Tertiary Care Centre of North India

Healthline ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 100-107
Author(s):  
Arti Agrawal ◽  
Vikas Kumar ◽  
Sanjeev Kumar ◽  
Neha K Mani
Keyword(s):  
Monsoon Season ◽  
Dengue Infection ◽  
Tertiary Care ◽  
Seasonal Distribution ◽  
North India ◽  
Care Centre ◽  
Tertiary Care Centre ◽  
Post Monsoon ◽  
Post Monsoon Season ◽  
Male Preponderance

Introduction: Dengue virus infection is a major public health issue prevalent in tropical and sub-tropical countries all over the world mostly in urban and semi-urban areas. WHO estimates about 50-100 million dengue infections worldwide every year. The present study is aimed to assess the prevalence and seasonal distribution of dengue disease during three consecutive years from 2016-2018 at a tertiary care centre of North India. Method: This is an observational retrospective study conducted on total 6,481 clinical suspected cases referred from indoor and outdoor departments of Medicine and Pediatrics of one of the medical colleges of Agra during the period from 1st January 2016 to 31st December 2018. Results: The maximum positivity was recorded in the year 2016 (16.66%), followed by 2017 (14.07%) and 2018(13.56%).Our study shows male preponderance with maximum cases in the year 2018 was recorded in the month of October (22.75%) whereas the lowest in the month of May (1.96%). Most of the cases were in the age group 0-30 years with a male preponderance. The outbreak occurred during the months of August to November indicating vector transmission in the monsoon and post-monsoon season. Conclusion: From the analysis, this study reflects that the numbers of dengue cases in 2016 were maximum and outnumbered the dengue cases among three consecutive years from 2016 to 2018. The peak in dengue positivity was observed during September to October. As this disease affects the population in the monsoon and post monsoon months therefore continuous monitoring of dengue infection is important during the post-monsoon season.

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