Decadal Spatial-Temporal Variations in the Spatial Pattern of Anomalies of Extreme Precipitation Thresholds (Case Study: Northwest Iran)
Abstract
:1. Introduction
2. Materials and Method
3. Results and Discussion
3.1. General Features of Extreme Precipitation
3.2. Analysis of Threshold Spatial Autocorrelation Pattern
3.3. Analysis of Extreme Precipitation Threshold Patterns in the Northwest of Iran
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Index | 1961–1970 | 1971–1980 | 1981–1990 | 1991–2000 | 2001–2010 | 1961–2010 |
---|---|---|---|---|---|---|
mean | 9.2 | 8.4 | 11.2 | 9.1 | 8.1 | 9.2 |
median | 8.9 | 7.9 | 7.5 | 8.7 | 8.0 | 8.2 |
mode | 5.8 | 6.3 | 7.3 | 6.1 | 7.0 | 4.7 |
var | 8.9 | 8.1 | 2363.2 | 7.7 | 10.7 | 480.8 |
std | 3.0 | 2.8 | 48.6 | 2.8 | 3.3 | 21.9 |
cv | 32.3 | 33.9 | 433.8 | 30.4 | 40.2 | 237.8 |
Skewness | 1.1 | 2.8 | 20.2 | 1.5 | 0.6 | 44.4 |
kurtosis | 6.0 | 25.0 | 491.9 | 7.0 | 7.0 | 239.1 |
max | 29.5 | 51.0 | 165.5 | 28.5 | 33.7 | 165.5 |
Q1 | 7.2 | 6.6 | 6.1 | 7.3 | 6.8 | 6.8 |
Q2 | 8.9 | 7.9 | 7.5 | 8.7 | 8.0 | 8.2 |
Q3 | 10.9 | 9.6 | 9.4 | 10.4 | 9.6 | 10.1 |
Cycle | 1961–1970 | 1971–1980 | 1981–1990 | 1991–2000 | 2001–2010 | 1961–2010 |
---|---|---|---|---|---|---|
6–8 | 23.9 | 42.4 | 59.7 | 57.3 | 59.7 | 34.5 |
8–10 | 50 | 45.5 | 20 | 28.8 | 3.23 | 50.5 |
10–12 | 21.3 | 8.5 | 13.6 | 8.9 | 5.6 | 9.7 |
12–14 | 4.3 | 2.7 | 4.4 | 3.8 | 1.4 | 3.8 |
>14 | 0.4 | 0.9 | 2.3 | 1.2 | 0.9 | 1.5 |
Anomaly% | ||||||
negative | 52.6 | 56.6 | 82.4 | 61.5 | 65.5 | 73.98 |
Positive | 47.4 | 43.4 | 17.6 | 38.5 | 34.5 | 26.11 |
1961–1970 | 1971–1980 | 1981–1990 | 1991–2000 | 2001–2010 | 1961–2010 | |
---|---|---|---|---|---|---|
<−2.58 Std-Dev. | 25.90521 | 12.00632 | 0 | 10.34755 | 4.344392 | 0 |
−2.58–−1.96 Std-Dev. | 6.872038 | 6.240126 | 0 | 5.845182 | 10.11058 | 0.473934 |
−1.96–−1.65 Std-Dev. | 3.080569 | 3.554502 | 0 | 3.00158 | 6.082148 | 4.186414 |
−1.65–1.65 Std-Dev. | 39.17852 | 60.29384 | 91.46603 | 70.00316 | 68.60979 | 86.4613 |
1.65–1.96 Std-Dev. | 0.157978 | 0.394945 | 0.078989 | 0.078989 | 0.157978 | 0.078989 |
1.96–2.58 Std-Dev. | 3.974724 | 2.685624 | 0.157978 | 1.342812 | 0.947867 | 0.552923 |
>2.58 Std-Dev. | 20.06319 | 15.08689 | 7.633491 | 9.636651 | 8.503949 | 8.766193 |
Cycle | 1961–1970 | 1971–1980 | 1981–1990 | 1991–2000 | 2001–2010 | 1961–2010 |
---|---|---|---|---|---|---|
0–2 | 42.7 | 86.9 | 81.1 | 44.5 | 60.7 | 46.1 |
2–4 | 28.4 | 4.1 | 8 | 23.9 | 10.9 | 18.7 |
4–6 | 12.6 | 8.2 | 8.4 | 18.6 | 6.7 | 1.7 |
6–8 | 0 | 0 | 0 | 0 | 0 | 24.4 |
>8 | 11.7 | 0.9 | 2.7 | 13 | 21.6 | 9.1 |
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Rousta, I.; Nasserzadeh, M.H.; Jalali, M.; Haghighi, E.; Ólafsson, H.; Ashrafi, S.; Doostkamian, M.; Ghasemi, A. Decadal Spatial-Temporal Variations in the Spatial Pattern of Anomalies of Extreme Precipitation Thresholds (Case Study: Northwest Iran). Atmosphere 2017, 8, 135. https://doi.org/10.3390/atmos8080135
Rousta I, Nasserzadeh MH, Jalali M, Haghighi E, Ólafsson H, Ashrafi S, Doostkamian M, Ghasemi A. Decadal Spatial-Temporal Variations in the Spatial Pattern of Anomalies of Extreme Precipitation Thresholds (Case Study: Northwest Iran). Atmosphere. 2017; 8(8):135. https://doi.org/10.3390/atmos8080135
Chicago/Turabian StyleRousta, Iman, Mohammad Hossain Nasserzadeh, Masoud Jalali, Esmaeil Haghighi, Haraldur Ólafsson, Saeide Ashrafi, Mehdi Doostkamian, and Ali Ghasemi. 2017. "Decadal Spatial-Temporal Variations in the Spatial Pattern of Anomalies of Extreme Precipitation Thresholds (Case Study: Northwest Iran)" Atmosphere 8, no. 8: 135. https://doi.org/10.3390/atmos8080135