scholarly journals Modeling study of PM<sub>2.5</sub> pollutant transport across cities in China's Jing–Jin–Ji region during a severe haze episode in December 2013

2015 ◽  
Vol 15 (10) ◽  
pp. 5803-5814 ◽  
Author(s):  
C. Jiang ◽  
H. Wang ◽  
T. Zhao ◽  
T. Li ◽  
H. Che
Keyword(s):  
Wind Speed ◽  
Pollution Source ◽  
Lower Atmosphere ◽  
Surrounding Area ◽  
Southerly Wind ◽  
Beijing Area ◽  
Pollution Levels ◽  
Neighbouring Region ◽  
Haze Episode ◽  
The City

Abstract. To study the influence of particulate matter (PM) transported from surrounding regions on the high PM2.5 pollution levels in Beijing, the GRAPES-CUACE model was used to simulate a serious haze episode that occurred on 6–7~December 2013. The results demonstrate the model's suitability for describing haze episodes throughout China, especially in the Beijing–Tianjin–Hebei (Jing–Jin–Ji) region. A very close positive correlation was found between the southerly wind speed over the plain to the south of Beijing and changes in PM2.5 in Beijing, both reaching maximum values at about 900 hPa, suggesting that the lower atmosphere was the principal layer for pollutant PM transport from its southern neighbouring region to Beijing. During haze episodes, and dependent upon the period, Beijing was either a pollution source or sink for its surrounding area. PM input from Beijing's environs was much higher than the output from the city, resulting in the most serious pollution episode, with the highest PM2.5 values occurring from 00:00 to 10:00 UTC (08:00 to 18:00 LT), 7 December 2013. PM pollutants from the environs of the city accounted for over 50 % of the maximum PM2.5 values reached in Beijing. At other times, the Beijing area was a net contributor to pollution in its environs.

scholarly journals Modeling study of PM<sub>2.5</sub> pollutant transport across cities in China's Jing–Jin–Ji region during a severe haze episode in December 2013

2015 ◽  
Vol 15 (3) ◽  
pp. 3745-3776 ◽  
Author(s):  
C. Jiang ◽  
H. Wang ◽  
T. Zhao ◽  
T. Li ◽  
H. Che
Keyword(s):  
Particulate Matter ◽  
Wind Speed ◽  
Pollution Source ◽  
Lower Atmosphere ◽  
Surrounding Area ◽  
Southerly Wind ◽  
Beijing Area ◽  
Pollution Levels ◽  
Haze Episode ◽  
The City

Abstract. To study the influence of particulate matter (PM) transported from surrounding regions on the high PM2.5 pollution levels in Beijing, the GRAPES-CUACE model was used to simulate a serious haze episode that occurred on 6–7 December 2013. The results demonstrate the model's suitability for describing haze episodes throughout China, especially in the Beijing–Tianjin–Hebei (Jing–Jin–Ji) region. A very close positive correlation was found between the southerly wind speed over the plain to the south of Beijing and changes in PM2.5 in Beijing, both reaching maximum values at ca. 900 hPa, suggesting the lower atmosphere was the principal layer for pollutant PM transport from its southern neighboring region to Beijing. During haze episodes, and dependent upon the period, Beijing was either a pollution source or sink for its surrounding area. PM input from Beijing's environs was much higher than the output from the city, resulting in the most serious pollution episode, with the highest PM2.5 values occurring from 00:00 to 10:00 UTC 7 December 2013. PM pollutants from the environs of the city accounted for over 50% of the maximum PM2.5 values reached in Beijing. At other times, the Beijing area was a net contributor to pollution in its environs.

scholarly journals Lidar-derived aerosol concentration and their relationship with horizontal winds over an urban location

MAUSAM ◽  
2022 ◽  
Vol 53 (2) ◽  
pp. 145-152
Author(s):  
P. ERNEST RAJ ◽  
P.C.S. DEVARA ◽  
R. S. MAHESKUMAR ◽  
G. PANDITHURAI ◽  
K.K. DANI
Keyword(s):  
Wind Speed ◽  
Winter Season ◽  
India Meteorological Department ◽  
Ground Level ◽  
Aerosol Concentration ◽  
Lower Atmosphere ◽  
Wind Speeds ◽  
Short And Long Term ◽  
The City

Lidar-derived aerosol vertical profiles obtained at Pune, a low latitude tropical station, on about 535 days during a ten-year period (1987 – 96) along with simultaneous pilot-balloon wind (speed and direction) data of India Meteorological Department, Pune have been used in the study to investigate the influence of horizontal winds on the aerosol characteristics in the lower atmosphere.  Aerosol column content in the atmospheric boundary layer (surface to 1100 m altitude above ground-level) as well as aerosol number density at the surface level (at 50 m) showed relatively higher values over the lidar site whenever the winds were blowing from the main urban and industrial regions of the city of Pune.  This effect was found to be more pronounced during the winter season.  Wind speeds also correlate well with increased aerosol loading, but only during selected high wind speed episodes.  Thus the study shows that the short- and long-term increases in aerosol concentration/loading over the observation site are, to a large extent, influenced by horizontal winds in the surface layers and this in turn, can be attributed to the increasing human/urban activity around the lidar site over the years.

Pelatihan Pengemasan Dan Pelabelan Bandeng Sapit Di UD. Barokah Gunung Anyar Tambak

2020 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Sri Winarti ◽  
Yuni Ningsih
Keyword(s):  
Food Products ◽  
Food Labeling ◽  
Surrounding Area ◽  
Community Groups ◽  
Plastic Bag ◽  
The Law ◽  
Thin Plastic ◽  
Processed Products ◽  
The City

Gunung Anyar Tambak is one of the villages that is located adjacent to the UPN "Veteran" campus in East Java. Most (2/3) of the Gunung Anyar Tambak area is the pond area, which has the main yield is milkfish. Besides being sold in fresh form, milkfish from ponds from Gunung Anyar Tambak are also processed into a variety of processed products including shredded, crackers, soft thorns and milkfish “sapit”. Milkfish “Sapit” is a processed milkfish which is unique in its serving. The milkfish are clamped using bamboo stems and then processed using a choice of spices that make a distinctive taste in this dish. Processing by burning, causing a distinctive aroma that is not forgotten. Barokah is one of the community groups of “sapit” milkfish processing in RW I of Gunung Anyar Tambak Village which consists of 6 people. Chairman of UD. Barokan is Hj's. Khasibah, explained that most of the milkfish produced are only fulfilling orders from the surrounding area and orders from outside the city to be used as souvenirs typical of Surabaya. From observations and interviews it is known that the problem in processing milkfish is a very simple packaging that is a very thin plastic bag that is not closed. The second problem is that the packaging has no labeling at all, even though the label can identify the identity of the product in the package. The importance of labels on food products in addition to being the identity of the packaged product is also a communication between producers and consumers. Therefore a very absolute label must be given to the marketed food products. Training has been conducted on packaging and labeling milkfish “sapit” in UD. BAROKAH, Gunung Anyar Tambak, Surabaya. Before being packed with a vacuum packer, milkfish saplings are first dried in a cabinet dryer for 3 hours at 60°C. Labeling on milkfish packaging is in accordance with the law on food labeling on primary (plastic) and secondary (carton) packaging. In addition to providing training, our team also donates dryers and Vacuum Sealers.

The impact of urban effluents on the coastal marine environment of Mediterranean islands

1995 ◽  
Vol 32 (9-10) ◽  
pp. 85-94 ◽  
Author(s):  
Michael O. Angelidis
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Marine Environment ◽  
Suspended Particle ◽  
Pollution Source ◽  
Mediterranean Islands ◽  
Coastal Marine Environment ◽  
Coastal Marine ◽  
The Impact ◽  
The City

The impact of the urban effluents of Mytilene (Lesvos island, Greece) on the receiving coastal marine environment, was evaluated by studying the quality of the city effluents (BOD5, COD, SS, heavy metals) and the marine sediments (grain size, organic matter, heavy metals). It was found that the urban effluents of Mytilene contain high organic matter and suspended particle load because of septage discharge into the sewerage network. Furthermore, although the city does not host important industrial activity, its effluents contain appreciable metal load, which is mainly associated with the particulate phase. The city effluents are discharged into the coastal marine environment and their colloidal and particulate matter after flocculation settles to the bottom, where is incorporated into the sediments. Over the years, the accumulation of organic matter and metals into the harbour mud has created a non-point pollution source in the relatively non-polluted coastal marine environment of the island. Copper and Zn were the metals which presented the higher enrichment in the sediments of the inner harbour of Mytilene.

A case study of noise pollution levels during the restrictions period due to COVID-19.

2021 ◽  
Vol 263 (6) ◽  
pp. 206-214
Author(s):  
David Montes-González ◽  
Juan Miguel Barrigón-Morillas ◽  
Ana Cristina Bejarano-Quintas ◽  
Manuel Parejo-Pizarro ◽  
Guillermo Rey-Gozalo ◽  
...  
Keyword(s):  
Noise Pollution ◽  
Urban Environments ◽  
Control Measures ◽  
Acoustic Measurements ◽  
Pollution Levels ◽  
The World ◽  
The Impact ◽  
The City

The pandemic of coronavirus disease (COVID-19) led to the need for drastic control measures around the world to reduce the impact on the health of the population. The confinement of people in their homes resulted in a significant reduction in human activity at every level (economic, social, industrial, etc.), which was reflected in a decrease in environmental pollution levels. Studying the evolution of parameters, such as the level of environmental noise caused by vehicle traffic in urban environments, makes it possible to assess the impact of this type of measure. This paper presents a case study of the acoustic situation in Cáceres (Spain) during the restriction period by means of long-term acoustic measurements at various points of the city.

Dependence of Aerosol Particle Concentration in Surface Air over the Moscow Region on Wind Speed and Lapse Rate

2021 ◽  
pp. 103-110
Author(s):  
E. A. Stulov ◽  
◽  
E. V. Sosnikova ◽  
N. A. Monakhova ◽  
◽  
...  
Keyword(s):  
Surface Layer ◽  
Wind Speed ◽  
Particle Concentration ◽  
Meteorological Factors ◽  
Lapse Rate ◽  
Radiosonde Data ◽  
Vertical Temperature Gradient ◽  
Vertical Temperature ◽  
Simple Estimation ◽  
The City

Based on the daily measurements of atmospheric aerosol characteristics in the city of Dolgoprudny (20 km from the center of Moscow) carried out during 2013-2018, the influence of some meteorological factors on the concentration of various aerosol fractions in the surface layer of the atmosphere is analyzed. It is that the aerosol concentration depends most on the wind speed and the vertical temperature gradient. The method of simple estimation of aerosol particles accumulation conditions in the surface layer based on the use of standard radiosonde data is developed.

scholarly journals Wind Estimation in the Lower Atmosphere Using Multirotor Aircraft

2017 ◽  
Vol 34 (5) ◽  
pp. 1183-1191 ◽  
Author(s):  
Ross T. Palomaki ◽  
Nathan T. Rose ◽  
Michael van den Bossche ◽  
Thomas J. Sherman ◽  
Stephan F. J. De Wekker
Keyword(s):  
Wind Speed ◽  
Sonic Anemometer ◽  
Unmanned Aircraft ◽  
Lower Atmosphere ◽  
Promising Alternative ◽  
Atmospheric Structure ◽  
Structure And Dynamics ◽  
Sonic Anemometers ◽  
Vertical Profiling ◽  
Good Agreement

AbstractUnmanned aerial vehicles are increasingly used to study atmospheric structure and dynamics. While much emphasis has been on the development of fixed-wing unmanned aircraft for atmospheric investigations, the use of multirotor aircraft is relatively unexplored, especially for capturing atmospheric winds. The purpose of this article is to demonstrate the efficacy of estimating wind speed and direction with 1) a direct approach using a sonic anemometer mounted on top of a hexacopter and 2) an indirect approach using attitude data from a quadcopter. The data are collected by the multirotor aircraft hovering 10 m above ground adjacent to one or more sonic anemometers. Wind speed and direction show good agreement with sonic anemometer measurements in the initial experiments. Typical errors in wind speed and direction are smaller than 0.5 and 30°, respectively. Multirotor aircraft provide a promising alternative to traditional platforms for vertical profiling in the atmospheric boundary layer, especially in conditions where a tethered balloon system is typically deployed.

Exploring a Sense of Place in Lu Cuo Xiamen

2014 ◽  
Vol 584-586 ◽  
pp. 713-716
Author(s):  
Xiao Jian Yu
Keyword(s):  
Sense Of Place ◽  
Landscape Architecture ◽  
Overseas Chinese ◽  
Surrounding Area ◽  
The South ◽  
Landscape Features ◽  
Architectural Styles ◽  
History Of ◽  
The City

South-Fujian is one of the most famous hometowns for overseas Chinese. Lu Cuo is the most significant landscape architecture of the South-Fujian. The development of Lu Cuo is a struggle history of South-Fujianese. Locating in the center of the city, Lu Cuo has faced the danger of being destroyed as many of valuable Cuo. This study investigated landscape features of Lu Cuo, including the arcade, dovetail roof ridge, red brick, and exquisite carvings. The results showed that Lu Cuo is the pluralistic coexistence with Chinese and Western architectural styles. Therefore, the study suggests that cultural vale and physical value are importance for preserving and managing Lu Cuo and its surrounding area.

scholarly journals Effects of Air Pollutants on Summer Precipitation in Different Regions of Beijing

Atmosphere ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 141
Author(s):  
Yan Yang ◽  
Wei Zhou ◽  
Qian Gao ◽  
Delong Zhao ◽  
Xiange Liu ◽  
...  
Keyword(s):  
Air Pollutants ◽  
Summer Precipitation ◽  
Weather Research And Forecasting ◽  
Mountainous Areas ◽  
Cloud Droplets ◽  
Beijing Area ◽  
Pollution Levels ◽  
Mountainous Regions ◽  
Effective Particle ◽  
Air Layers

Many studies have shown that air pollutants have complex impacts on urban precipitation. Meteorological weather station and satellite Aerosol Optical Depth (AOD) product data from the last 20 years, combined with simulation results from the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem), this paper focuses on the effects of air pollutants on summer precipitation in different regions of Beijing. These results showed that air pollution intensity during the summer affected the precipitation contribution rate (PCR) of plains and mountainous regions in the Beijing area, especially in the plains. Over the past 20 years, plains PCR increased by ~10% when the AOD augmented by 0.15, whereas it decreased with lower pollution levels. In contrast, PCR in mountainous areas decreased with higher pollution levels and increased with lower pollution levels. Our analysis from model results indicated that aerosol increases reduce the effective particle size of cloud droplets and raindrops. Smaller cloud raindrops more readily transport to high air layers and participate in the generation of ice-phase substances in the clouds, increasing the total amount of cloud water in the air in a certain time, which ultimately enhanced precipitation intensity on the plains. The removal of pollutants caused by increased precipitation in the plains decreased rainfall levels in mountainous areas.

scholarly journals STUDI KELAYAKAN THEME CENTER DI AREA PELABUHAN SUNDA KELAPA, JAKARTA UTARA

2020 ◽  
Vol 1 (2) ◽  
pp. 2145
Author(s):  
Kelvin Aulia ◽  
Priyendiswara A.B. Priyendiswara ◽  
Liong Ju Tjung
Keyword(s):  
Feasibility Study ◽  
Market Analysis ◽  
Investment Analysis ◽  
Location Analysis ◽  
Master Plan ◽  
Surrounding Area ◽  
City Area ◽  
12Th Century ◽  
The City

Sunda Kelapa Harbor is a port located in Penjaringan Subdistrict, Penjaringan Village, North Jakarta, which was formerly called Kalapa Port in the 12th century and is the most important port of the Kingdom of Pajajaran. Then at the time of the entry of Islam and the invaders from Europe, the Port of Kalapa was contested between the Archipelago and European kingdoms. In 1970 after the Dutch succeeded in taking control of the area and around it made the port name of Kalapa transform into Sunda Kelapa Substitution. Considering that the Sunda Kelapa Port and the surrounding area are regions with high historical values, the issuance of the city area master plan is stated in the DKI Jakarta Governor Regulation No. 36 of 2014. The Governor's Regulation stipulates that the Sunda Kelapa Port will be developed into a historical tourism area and commercial facilities will be developed in it. The general objective of this study is to conduct a feasibility study on the development of commercial facilities in Sunda Kelapa Port. The feasibility study consists of location, legality, market and investment analysis. This writing places more emphasis on location analysis and market analysis that will show the potential of development to be carried out in a limited section of the mall. The results of this study are expected to provide input to those who will develop the project in the area of Sunda Kelapa Port precisely in the limited mall section with the concept center. AbstrakPelabuhan Sunda Kelapa merupakan pelabuhan yang berlokasi di Kecamatan Penjaringan, Kelurahan Penjaringan, Jakarta Utara yang dahulu bernama Pelabuhan Kalapa pada abad ke 12 dan merupakan pelabuhan terpenting Kerajaan Pajajaran. Kemudian pada masa masuknya Islam dan para Penjajah dari Eropa, Pelabuhan Kalapa diperebutkan antara kerajaan-kerajaan Nusantara dan Eropa. Pada tahun 1970 setelah Belanda berhasil menguasai daerah tersebut dan sekitarmya membuat nama pelabuhan Kalapa berubah menjadi Pelubahan Sunda Kelapa. Mengingat Pelabuhan Sunda Kelapa dan daerah sekitarnya merupakan wilayah dengan nilai sejarah yang tinggi menyebabkan diterbitkannya rencana induk kawasan kota yang tertera pada Peraturan Gubernur DKI Jakarta No. 36 Tahun 2014. Peraturan Gubernur tersebut menetapkan Pelabuhan Sunda Kelapa akan dikembangkan menjadi kawasan pariwisata sejarah dan akan dikembangkan fasilitas komersial di dalamnya. Tujuan umum penelitian ini adalah untuk melakukan studi kelayakan pengembangan fasilitas komersial di Pelabuhan Sunda Kelapa. Studi kelayakan tersebut terdiri dari analisis lokasi, legalitas, pasar dan investasi. Penulisan ini lebih menekankan pada analisis lokasi, analisis legalitas dan analisis pasar yang akan memperlihatkan potensi dari pengembangan yang akan dilakukan pada bagian mall terbatas. Hasil kajian ini diharapkan dapat memberi masukan kepada pihak yang akan melakukan pengembangan proyek di area Pelabuhan Sunda Kelapa tepatnya pada bagian mall terbatas dengan konsep Theme Center.

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