Related Experiment Video
Updated: Sep 20, 2025
10:35
A Protocol for Conducting Rainfall Simulation to Study Soil Runoff
Published on: April 3, 2014
21.0K
Geospatial analysis of rainfall consistency and transition patterns in Iran
Saeideh Ashrafi1, Ali Reza Karbalaee2, Mohammad Kamangar1
1Department of Climatology, Faculty of Humanities, Zanjan University, Zanjan, Iran.
Summary
Precipitation patterns in Iran show significant regional differences. The central and eastern regions frequently experience dry spells, while the Caspian region has a higher chance of rain, impacting climate stability.
Area of Science:
- Climatology and Atmospheric Science
- Geospatial Analysis of Climate Data
Background:
- Climate phenomena are often stochastic, leading to varied outcomes.
- Understanding precipitation state transitions is crucial for regional climate analysis.
Purpose of the Study:
- To analyze precipitation state transition patterns in Iran using probabilistic models.
- To investigate sequential changes in precipitation and their impact on climate stability.
Main Methods:
- Utilized daily precipitation data from 411 synoptic stations (1970-2021).
- Applied kriging interpolation for daily precipitation maps.
- Employed precipitation state transition analysis (PSTA) to scrutinize transition patterns.
Main Results:
- Central, eastern, and southeastern Iran show high dry-to-dry day transition probabilities (>0.96).
- The Caspian region exhibits higher dry-to-rainy day transitions (>0.45) and lower dry-to-dry probabilities (<0.50).
- Geographical disparities are linked to proximity to highlands and moisture sources like the Caspian Sea.
Conclusions:
- Significant geographical variations in precipitation transition probabilities exist across Iran.
- These findings enhance predictions of climate change and precipitation stability.
- Understanding regional climate dynamics is key for effective water resource management.
Keywords:
Change analysisClimatic patternsIranKrigingPrecipitation probabilityPrecipitation state transition analysis (PSTA)More Related Videos
15:30A Telemetric, Gravimetric Platform for Real-Time Physiological Phenotyping of Plant–Environment Interactions
Published on: August 5, 2020
11.8K
07:14Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
Published on: May 1, 2018
7.9K
Related Concept Videos
01:17Precipitation and Co-precipitation
2.2K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
2.2K
01:12Precipitation Processes
610
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
610
01:03Precipitation Gravimetry
7.7K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
7.7K
01:17Design Example: Analyzing Capacity Contours for Flood Risk Assessment
109
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
109
01:21Precipitation Titration Curve: Analysis
1.2K
The precipitation titration curve demonstrates the change in concentration of one reactant with the volume of titrant added. During the titration of chloride ions with silver nitrate, the precipitation titration curve is divided into three regions: before, at, and after the equivalence point. Before the equivalence point, low redissolution of the sparingly soluble silver chloride precipitate gives a low silver ion concentration. However, in the second region, representing the equivalence point,...
1.2K
01:21Manipulation and Analysis
70
GIS manipulation and analysis functions are vital for decision-making and planning. These activities range from data retrieval tasks, such as selecting information based on specific criteria, to advanced analytical techniques that address complex spatial problems.One critical GIS analysis method is overlaying, which combines multiple data layers to examine impacts. For example, overlaying a river-dammed lake boundary with road networks can identify affected infrastructure. Another common...
70