scholarly journals Effects and Correction of Atmospheric Pressure Loading Deformation on GNSS Reference Stations in Mainland China

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Caiya Yue ◽  
Yamin Dang ◽  
Changhui Xu ◽  
Shouzhou Gu ◽  
Huayang Dai
Keyword(s):  
Time Series ◽  
Atmospheric Pressure ◽  
Northeast China ◽  
North China ◽  
Mainland China ◽  
Central China ◽  
Eastern Area ◽  
The North ◽  
North Eastern ◽  
Pressure Changes

Atmospheric pressure loading (APL) deformation is one component of nontectonic deformation for Global Navigation Satellite System (GNSS) time series and is a kind of deformation response caused by a redistribution of atmospheric pressure. In this paper, we present an atmospheric data processing strategy to compute the APL based on a spherical harmonic expansion of the global atmosphere pressure changes. We also provide a sample model to describe the relativity between the global atmosphere pressure changes and APL vertical deformation. The results show that the variation of air mass has a major impact on the north-eastern area of East China, the eastern area of North China, and Northeast China, and the vertical crustal displacement caused by the atmosphere changes in these regions can reach about 20 mm. The correction of APL for vertical time series of GNSS reference stations in different regions indicates that the arid area of the Northwest China, Northeast China, Central China, and North China are greatly affected by APL. While for the station located in Sichuan-Yunnan region, the amplitude and period change are small after correction of APL for vertical time series of GNSS reference stations, which reveals that the area is seriously affected by tectonic movement and water migration loading. The correlation between atmospheric pressure changes and crustal deformation is analyzed, which shows that APL has a serious impact on the north-eastern area of North China, the Northeast China, and the eastern area of Central China when the variations in atmospheric pressure in mainland China are the same. The research results of this paper will provide some reference value for the study of crustal structural deformation and the establishment of geodetic datum.

Fan Lift in VTOL Design

1969 ◽  
Vol 73 (704) ◽  
pp. 657-664 ◽  
Author(s):  
R. G. West
Keyword(s):  
Traffic Control ◽  
Air Traffic Control ◽  
Air Traffic ◽  
Eastern Area ◽  
The Past ◽  
The North ◽  
Safe Level ◽  
Commercial Airline ◽  
Time Period ◽  
North Eastern

During the past two years the commercial airline operators and the travelling public alike have been forced to acknowledge the rapid increase in airport congestion. This problem is most marked in the North Eastern area of America at the present time but a similar situation will develop fairly soon at major airports in Europe. Even with the introduction of the airbus to scheduled services, the number of aircraft movements at conventional airports, within a given time period, will reach a maximum safe level. The restrictions are imposed partly by the large number of aircraft operations on each runway, and partly by Air Traffic Control safety limits.

How aerosol transport from the North China plain contributes to air quality in northeast China

2020 ◽  
Vol 738 ◽  
pp. 139555 ◽  
Author(s):  
Hujia Zhao ◽  
Huizheng Che ◽  
Lei Zhang ◽  
Ke Gui ◽  
Yanjun Ma ◽  
...  
Keyword(s):  
Air Quality ◽  
Northeast China ◽  
North China Plain ◽  
North China ◽  
Aerosol Transport ◽  
The North ◽  
The North China Plain

Age and Growth of North Sea Echinoids

1985 ◽  
Vol 65 (3) ◽  
pp. 583-588 ◽  
Author(s):  
A. A. T. Sime ◽  
G. J. Cranmer
Keyword(s):  
Shallow Water ◽  
North Sea ◽  
Age And Growth ◽  
Eastern Area ◽  
The North ◽  
Small Variety ◽  
North Eastern ◽  
The North Sea ◽  
Northern North Sea

The genus Echinus is common throughout the entire northern North Sea. Echinus esculentus L. predominates in the shallow water off the eastern Scottish coast down to 100 m, while the small variety of Echinus acutus var. norvegicus (Düben and Koren) is rarely found in depths of less than 100 m and is most commonly located in the north-eastern area of the North Sea (Cranmer, 1985).

Precise identification of maize in the North China Plain based on Sentinel-1A SAR time series data

2018 ◽  
Vol 40 (5-6) ◽  
pp. 1996-2013 ◽  
Author(s):  
Li Li ◽  
Qingling Kong ◽  
Pengxin Wang ◽  
Lan Xun ◽  
Lei Wang ◽  
...  
Keyword(s):  
Time Series ◽  
North China Plain ◽  
North China ◽  
Time Series Data ◽  
Series Data ◽  
The North ◽  
The North China Plain ◽  
Precise Identification

scholarly journals Lombard weapons from Fiesole, Tuscany (6th – 7th century C.E.): old archaeological data for new considerations / Langobardsko orožje iz Fiesole v Toskani (6.–7. stoletje n. št.): stari arheološki podatki za nove razmisleke

2021 ◽  
Vol 9 (1) ◽  
pp. 67-86
Author(s):  
Andrea Biondi
Keyword(s):  
Late Antiquity ◽  
National Scale ◽  
Eastern Area ◽  
Archaeological Data ◽  
The North ◽  
North Eastern ◽  
Relevant Term ◽  
Similar Materials ◽  
Archaeological Analysis

The article focuses on the analysis of seven Lombard weapons datable between the end of 6th and the 7th century C.E. and present in the Archaeological Museum of Fiesole, in the north-eastern area of Tuscany in Italy. These objects, only partially published, and coming both from the Lombard necropolis of Area Garibaldi and from unknown contexts, have been compared with similar materials on national scale of the 6th-7th century C.E. and represent a relevant term of archaeological analysis for the transition between Late Antiquity Era and Lombard domination in Fiesole.

scholarly journals A Complex of the Early-Eleventh Century Finds from a Cistern in Quarter IX of Chersonese

2021 ◽  
pp. 90-106
Author(s):  
Larissa V. Sedikova ◽  
Stanislav G. Ryzhov
Keyword(s):  
Eleventh Century ◽  
Residential Buildings ◽  
Northern Caucasus ◽  
Ceramic Ware ◽  
Polished Surface ◽  
Marmara Sea ◽  
Eastern Area ◽  
The North ◽  
North Eastern ◽  
White Clay

This paper discusses a complex of ceramic finds excavated from a cistern in quarter IX in the north-eastern area of Chersonese, which supplied water to a public bath at the first stage of its existence. Although the reasons why the cistern was covered with soil remain unclear, later on residential buildings appeared at this site. The finds published here comprised imported transport and table ceramic wares. The complex included brown-clay flat-handle transport pitchers, presumably from the Taman area; Günsenin I amphorae produced on the Marmara Sea coast to the south-west of Constantinople; Glazed White Ware II tableware (according to J. Hayes’ classification) and painted white-clay Polychrome Ware also produced in the vicinity of the Byzantine capital. A vessel with polished surface is probably connected with the manufacture of the Khazar Khanate circle. The questions of the chronology of specific pottery types nave been analysed with account to their modern dating. According to the combination of dates, the complex of finds from the cistern in question is attributable to the beginning of the eleventh century. An important role for the dating of the complex is played by the chronology of the white-clay polychrome ware clarified by G. Sanders and the absence of Günsenin II amphorae dating from the mid-eleventh to the early twelfth centuries. The ceramic ware from the infill of the cistern comprises only imported pieces and reflects the two directions of Cherson’s trade in the said period: first, Constantinople and its environs and second, the Azov Sea and Northern Caucasus area.

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