scholarly journals Satellite observations for describing fire patterns and climate-related fire drivers in the Brazilian savannas

2018 ◽  
Vol 18 (1) ◽  
pp. 125-144 ◽  
Author(s):  
Guilherme Augusto Verola Mataveli ◽  
Maria Elisa Siqueira Silva ◽  
Gabriel Pereira ◽  
Francielle da Silva Cardozo ◽  
Fernando Shinji Kawakubo ◽  
...  
Keyword(s):  
Land Use ◽  
Spatial Analysis ◽  
Spatial Patterns ◽  
Satellite Observations ◽  
Fire Occurrence ◽  
Burned Areas ◽  
Temporal And Spatial Patterns ◽  
The North ◽  
Vegetation Condition ◽  
Temporal And Spatial

Abstract. In the Brazilian savannas (Cerrado biome) fires are natural and a tool for shifting land use; therefore, temporal and spatial patterns result from the interaction of climate, vegetation condition and human activities. Moreover, orbital sensors are the most effective approach to establish patterns in the biome. We aimed to characterize fire, precipitation and vegetation condition regimes and to establish spatial patterns of fire occurrence and their correlation with precipitation and vegetation condition in the Cerrado. The Cerrado was first and second biome for the occurrence of burned areas (BA) and hotspots, respectively. Occurrences are higher during the dry season and in the savanna land use. Hotspots and BA tend to decrease, and concentrate in the north, but more intense hotspots are not necessarily located where concentration is higher. Spatial analysis showed that averaged and summed values can hide patterns, such as for precipitation, which has the lowest average in August, but minimum precipitation in August was found in 7 % of the Cerrado. Usually, there is a 2–3-month lag between minimum precipitation and maximum hotspots and BA, while minimum VCI and maximum hotspots and BA occur in the same month. Hotspots and BA are better correlated with VCI than precipitation, qualifying VCI as an indicator of the susceptibility of vegetation to ignition.

scholarly journals Temporal-spatial Analysis of Contributors’ Mapping Behavior for Building Data in OpenStreetMap

2019 ◽  
Vol 2 ◽  
pp. 1-10
Author(s):  
Jin Xu ◽  
Qi Zhou
Keyword(s):  
Spatial Distribution ◽  
Spatial Analysis ◽  
Spatial Patterns ◽  
Volunteered Geographic Information ◽  
Geographic Information ◽  
Developing Regions ◽  
Temporal And Spatial Patterns ◽  
Temporal And Spatial ◽  
One Year ◽  
Beijing China

<p><strong>Abstract.</strong> Volunteered Geographic Information (VGI) crowdsourced from volunteering posts, is closely related to contributors’ mapping behavior. As the most noticeable VGI source, OpenStreetMap (OSM) is one of the most studied objectives in VGI and data contributors. In this paper, temporal-spatial analysis is applied in seeking the temporal and spatial patterns of the number of buildings and contributors in Beijing, China. Temporal changes of the number of updated buildings, and the population of total, new and quitted contributors, were interpreted, as well as the spatial distribution of updated buildings, participated contributors, and frequency of updates. The result suggests that the number of updated buildings, participated contributors, new and quitted contributors are growing. Buildings are mostly updated by a small number of contributors, the majority of which did not participated in mapping in the previous year. Most contributors update buildings for one year without succeeding till the next. Contributors are interested in updating a large amount of buildings frequently around landmarks, commercial districts, universities, and transit hubs. They update buildings at an expanding range and an increasing density, but their attentions do not necessarily bring large quantity of building updates. In general, OSM buildings in developing regions with less complete database are updated under similar patterns as developed regions where data are much more complete.</p>

Climate Response to Rapid Urban Growth: Evidence of a Human-Induced Precipitation Deficit

2007 ◽  
Vol 20 (10) ◽  
pp. 2299-2306 ◽  
Author(s):  
Robert K. Kaufmann ◽  
Karen C. Seto ◽  
Annemarie Schneider ◽  
Zouting Liu ◽  
Liming Zhou ◽  
...  
Keyword(s):  
Land Use ◽  
Spatial Patterns ◽  
Urban Land Use ◽  
Climate Data ◽  
Landsat Images ◽  
Surface Hydrology ◽  
Temporal And Spatial Patterns ◽  
Temporal And Spatial ◽  
The Pearl River ◽  
Aerosol Emissions

Abstract The authors establish the effect of urbanization on precipitation in the Pearl River Delta of China with data from an annual land use map (1988–96) derived from Landsat images and monthly climate data from 16 local meteorological stations. A statistical analysis of the relationship between climate and urban land use in concentric buffers around the stations indicates that there is a causal relationship from temporal and spatial patterns of urbanization to temporal and spatial patterns of precipitation during the dry season. Results suggest an urban precipitation deficit in which urbanization reduces local precipitation. This reduction may be caused by changes in surface hydrology that extend beyond the urban heat island effect and energy-related aerosol emissions.

Temporal and spatial patterns in the surface-water biomass of phytoplankton in the North Water

2002 ◽  
Vol 49 (22-23) ◽  
pp. 4947-4958 ◽  
Author(s):  
Tsuneo Odate ◽  
Toru Hirawake ◽  
Sakae Kudoh ◽  
Bert Klein ◽  
Bernard LeBlanc ◽  
...  
Keyword(s):  
Surface Water ◽  
Spatial Patterns ◽  
Temporal And Spatial Patterns ◽  
The North ◽  
North Water ◽  
Temporal And Spatial

Temporal and spatial patterns of diarrhoea in the Mekong Delta area, Vietnam

2015 ◽  
Vol 143 (16) ◽  
pp. 3488-3497 ◽  
Author(s):  
D. PHUNG ◽  
C. HUANG ◽  
S. RUTHERFORD ◽  
C. CHU ◽  
X. WANG ◽  
...  
Keyword(s):  
Spatial Analysis ◽  
Spatial Patterns ◽  
Temporal Pattern ◽  
Mekong Delta ◽  
Health Impact ◽  
Climatic Conditions ◽  
Delta Area ◽  
Temporal And Spatial Patterns ◽  
Series Design ◽  
Temporal And Spatial

SUMMARYThis study examined the temporal and spatial patterns of diarrhoea in relation to hydro-meteorological factors in the Mekong Delta area in Vietnam. A time-series design was applied to examine the temporal pattern of the climate–diarrhoea relationship using Poisson regression models. Spatial analysis was applied to examine the spatial clusters of diarrhoea using Global Moran'sIand local indicators of spatial autocorrelation (LISA). The temporal pattern showed that the highest peak of diarrhoea was from weeks 30–42 corresponding to August–October annually. A 1 cm increase in river water level at a lag of 1 week was associated with a small [0·07%, 95% confidence interval (CI) 0·01–0·1] increase in the diarrhoeal rate. A 1 °C increase in temperature at lag of 2 and 4 weeks was associated with a 1·5% (95% CI 0·3−2·7) and 1·1% (95% CI 0·1−2·3) increase in diarrhoeal risk, respectively. Relative humidity and diarrhoeal risk were in nonlinear relationship. The spatial analysis showed significant clustering of diarrhoea, and the LISA map shows three multi-centred diarrhoeal clusters and three single-centred clusters in the research location. The findings suggest that climatic conditions projected to be associated with climate change have important implication for human health impact in the Mekong Delta region.

Effect of land use changes on the temporal and spatial patterns of carbon emissions and carbon footprints in the Sichuan Province of Western China, from 1990 to 2010

2016 ◽  
Vol 36 (22) ◽  
Author(s):  
彭文甫 PENG Wenfu ◽  
周介铭 ZHOU Jieming ◽  
徐新良 XU Xinliang ◽  
罗怀良 LUO Huailiang ◽  
赵景峰 ZHAO Jingfeng ◽  
...  
Keyword(s):  
Land Use ◽  
Spatial Patterns ◽  
Carbon Emissions ◽  
Land Use Changes ◽  
Sichuan Province ◽  
Western China ◽  
Carbon Footprints ◽  
Temporal And Spatial Patterns ◽  
Temporal And Spatial

Hawk kite as potential bird scare device (the case of pigeons and grain processing factory)

2018 ◽  
Vol 8 (2) ◽  
pp. 334-336
Author(s):  
A. V. Matsyura
Keyword(s):  
Spatial Patterns ◽  
Repellent Effect ◽  
Preliminary Results ◽  
Temporal And Spatial Patterns ◽  
Grain Processing ◽  
Feral Pigeons ◽  
Temporal And Spatial ◽  
Bird Behavior ◽  
Hooded Crows

Here we presented the preliminary results of hawk kite usage against the feral pigeons in some grain processing factory. We studied the temporal and spatial patterns of repellent effect and bird behavior. We suggested the feral pigeons gradually increase the level of tolerance towards the hawk kite if no additional repellent measures were undertaken. Moreover, even initially the feral pigeons demonstrate higher tolerance towards the hawk kite compared to the Rooks or Hooded Crows.

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