Related Experiment Video
Updated: Oct 13, 2025
08:20
In Situ Soil Moisture Sensors in Undisturbed Soils
Published on: November 18, 2022
6.7K
Analyzing WSTP trend: a new method for global warming assessment
Esmail Heydari Alamdarloo1, Ehsan Moradi1, Mahsa Abdolshahnejad1
1Department of Arid and Mountainous Regions Reclamation, Faculty of Natural Resources, University of Tehran, Tehran, Iran.
Environmental Monitoring and Assessment
|November 15, 2021
Summary
Global warming is extending warm seasons in Iran, particularly in arid regions, with earlier starts and longer durations observed over 30 years. This trend highlights increased thermal energy and necessitates adaptive land-use planning.
Area of Science:
- Climatology
- Environmental Science
- Time-Series Analysis
Background:
- Global warming necessitates robust methods for studying its impacts.
- Warm-season temperature parameters (WSTP) offer a potential metric for climate change assessment.
- Understanding regional variations in temperature trends is crucial for adaptation strategies.
Purpose of the Study:
- To investigate the spatial-temporal variations of WSTP in Iran over a 30-year period.
- To analyze trends in WSTP using statistical methods and identify correlations with time.
- To compare WSTP trends across different climatic zones within Iran.
Main Methods:
- Utilized daily temperature data from 1989-2018 for Iran.
- Extracted WSTP using TIMESAT software.
- Applied Mann-Kendall trend analysis, Pearson correlation, and linear regression for trend assessment.
Main Results:
- Hyper-arid zones exhibit the longest warm seasons (approx. 195 days) starting earlier and peaking sooner.
- Humid regions have shorter warm seasons but later end times.
- Significant trends detected: 98% decrease in warm season start time, increases in base value (66%), length (80%), and large integrated value (93%).
Conclusions:
- Iran is experiencing impacts of global warming, evidenced by extended warm seasons and increased thermal energy, especially in arid/hyper-arid areas.
- WSTP, particularly start time and large integrated value, are sensitive indicators of these changes.
- Adaptive land-use planning is essential given the observed warming trends and regional vulnerabilities.
Related Concept Videos
01:50Global Climate Change
25.0K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
25.0K
01:07What is Weather?
18.6K
Overview
18.6K
01:16What is Climate?
19.4K
Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
19.4K
01:14Temperature Measurement Sites
2.4K
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
2.4K
01:21Precipitation Titration Curve: Analysis
1.3K
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,...
1.3K