نتایج جستجو برای: spatial patterns of warm and dry climates

تعداد نتایج: 24091584  

2004
S. G. Haberle K. D. Bennett

Pollen analysis of continuous sediment cores from two lakes in the northern Chonos Archipelago (44 S) in southern Chile shows a complete postglacial record of vegetation change. The fossil records indicate that deglaciation was complete in the northern Chonos by at least 13,600 C yr BP. Ericaceous heath and grassland persisted for more than 600 years after deglaciation under the influence of dr...

2012
PETER C. CHU HONG-CHUN LI CHENWU FAN YONG-HENG CHEN

Published annual-to-decadal-resolution stalagmite dO records since AD 900 from six caves (Dongge, Furong, Heshang, Buddha, Shihua andWanxiang) in China were analyzed to detect temporal and spatial variability of the East Asian Summer Monsoon strength, which strongly affects wet/dry conditions in eastern China. The empirical mode decomposition method was used to obtain trends of the six cave rec...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی - دانشکده ادبیات و زبانهای خارجی 1391

although there are studies on pragmatic assessment, to date, literature has been almost silent about native and non-native english raters’ criteria for the assessment of efl learners’ pragmatic performance. focusing on this topic, this study pursued four purposes. the first one was to find criteria for rating the speech acts of apology and refusal in l2 by native and non-native english teachers...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شاهد - دانشکده علوم پایه 1388

introduction acetic acid bacteria are large group of obligate aerobic gram negative bacteria with the ability to oxidize ethanol to acetic acid (1). they are widely distributed in natural habitats and classified in family acetobacteraceae. members of this family are useful in industrial production of vinegar(2). acetic acid bacteria (aab) can use substrates as glucose, ethanol, lactate or glyc...

Journal: :Tree physiology 2017
Jose A Ramírez-Valiente Jeannine Cavender-Bares

In seasonally dry tropical forest regions, drought avoidance during the dry season coupled with high assimilation rates in the wet season is hypothesized to be an advantageous strategy for forest trees in regions with severe and long dry seasons. In contrast, where dry seasons are milder, drought tolerance coupled with a conservative resource-use strategy is expected to maximize carbon assimila...

2018
Erik Johansson Moohammed Wasim Yahia Ivette Arroyo Christer Bengs

The thermal environment outdoors affects human comfort and health. Mental and physical performance is reduced at high levels of air temperature being a problem especially in tropical climates. This paper deals with human comfort in the warm-humid city of Guayaquil, Ecuador. The main aim was to examine the influence of urban micrometeorological conditions on people's subjective thermal perceptio...

Journal: :Geophysical Research Letters 2022

Temperature and precipitation covary across timescales due to thermodynamic dynamic processes. We examine spatial patterns trends of daily dependence maximum minimum temperature anomalies the contiguous United States during 1950–2020. In warm season, temperatures are anomalously cool on wet days, while in days. During 1950–2020, warm-season increased 0.5°C more days than dry whereas warmed slig...

Nasreen Eisakhani, Parvin Ghafarian, Sahar Tajbakhsh,

Abstract In this research, SPEI (standardized precipitation and evaporation index) was used as an alternative index to SPI to study drought in warm southern coastal regions of Iran. Drought has a multi-scale nature that can be analyzed in time scales via analysis of precipitation and temperature data. Therefore, data were colected from 105 synoptic stations in Iran in 2015; Respective stati...

بذر افشان, جواد, قمقامی, مهدی, قهرمان, نوذر,

Multi site modeling of rainfall is one of the most important issues in environmental sciences especially in watershed management. For this purpose, different statistical models have been developed which involve spatial approaches in simulation and modeling of daily rainfall values. The hidden Markov is one of the multi-site daily rainfall models which in addition to simulation of daily rainfall...

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