Analysis of Drought Spatial Statistics in Iran

javizadeh, saeed; Hejazizadeh, Zahra

doi:10.29252/jgs.19.53.251

Cited by 3 publications

(3 citation statements)

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“…Accordingly, the spatial distribution of soil moisture in different longitudes shows that the highest amount of soil moisture occurs at a longitude of 52°, and the lowest value occurs at longitudes of 46 and 62°. The maximum value also occurs at a latitude of 38°, and the lowest value occurs at latitudes of 30-32° [23].…”

Section: Entropy Of Soil Heat Fluxmentioning

confidence: 88%

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Nature as a Teacher for Abiota Self-Organization in Terms of Entropy Analysis

Ledari¹,

Ledari²

2023

Exergy - New Technologies and Applications

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In this chapter, the various terms of entropy generation in terrestrial systems and the atmosphere are estimated by imitating the entropy analysis of a steam power generation (STPG). The highest entropy generation is associated with the outgoing longwave radiation flux (more than 20–200 times the downward solar radiation). The results indicate that the most significant terms of entropy generation (heat dissipation) in different processes are related to latent and sensible heat fluxes (similar to steam generation and flue gas of the STPG). The vegetation cover (boiler system) destroys a part of solar energy absorption in the form of entropy generated by the formation of water vapor and transpiration (steam turbine). Given that life is formed by the optimal balance between the system, the ecosystem, and the living and nonliving organisms, it is important to study the various entropy fluxes in ecosystems that can lead to ecosystem balance.

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Section: Entropy Of Soil Heat Fluxmentioning

confidence: 88%

“…A large area of Yazd province is semi-desert and without vegetation cover. Moreover, due to the semi-mountainous topography, it has many slopes facing southwest, which increases the amount of radiation per unit area, and consequently, the amount of reflection [23].…”

Section: The Long-wave Entropy Radiation In Different Seasons and Cli...mentioning

confidence: 99%

Nature as a Teacher for Abiota Self-Organization in Terms of Entropy Analysis

Ledari¹,

Ledari²

2023

Exergy - New Technologies and Applications

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“…In Iran, many researches have been done on albedo on a local scale (Kheirkhah Zarkesh et al, 2014;Akbarzadeh et al, 2013;Tazik et al, 2015;Firozi et al, 2018;Solaimani et al, 2018;Asadi et al , 2021). Albedo has been studied on a macro scale in some studies (Hejazizadeh, et al, 2017;Soltani Akmal, 2018;Karbalaee, 2020;Kefayat Motlagh, 2021).…”

Section: Introductionmentioning

confidence: 99%

Detection of Land Surface Albedo Changes over Iran using Remote Sensing Data

Motlagh

Darand

2023

Preprint

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Albedo is one of the key parameters in climatic studies. Investigating its temporal and spatial behavior can be a tool for understanding environmental changes. The MODIS sensor continuously produces the land surface albedo on a global scale and with the appropriate spatial resolution and makes it available to researchers. In this study, to analyze Iran’s surface albedo trend, first, the daily albedo data of the MODIS on Iran in the period from 1/1/2001 to 12/30/2021 with a spatial resolution of 500 meters was prepared from the NASA website. After the necessary pre-processing, the long-term seasonal and annual trend of Iran's albedo was calculated at the 90% confidence level using the non-parametric Mann-Kendall test. The findings showed that the albedo trend is positive in the lowland interior areas of Iran and negative in the highland areas. Since the decreasing trend of albedo in highland areas indicates the reduction of snow cover in these areas, this issue can challenge the life and water resources of these areas that rely on the accumulation of snow.

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