scholarly journals Trends in Extreme Climate Events over Three Agroecological Zones of Southern Ethiopia

2018 ◽  
Vol 2018 ◽  
pp. 1-17 ◽  
Author(s):  
Befikadu Esayas ◽  
Belay Simane ◽  
Ermias Teferi ◽  
Victor Ongoma ◽  
Nigussie Tefera
Keyword(s):  
Statistical Significance ◽  
Daily Temperature ◽  
Southern Ethiopia ◽  
Positive Trend ◽  
Extreme Climate ◽  
Temperature And Precipitation ◽  
Agroecological Zones ◽  
Expert Team ◽  
Slope Estimator ◽  
Increasing Trends

The study aims to assess trends in extremes of surface temperature and precipitation through the application of the World Meteorological Organization’s (WMO) Expert Team on Climate Change Detection and Indices (ETCCDI) on datasets representing three agroecological zones in Southern Ethiopia. The indices are applied to daily temperature and precipitation data. Nonparametric Sen’s slope estimator and Mann–Kendall’s trend tests are used to detect the magnitude and statistical significance of changes in extreme climate, respectively. All agroecological zones (AEZs) have experienced both positive and negative trends of change in temperature extremes. Over three decades, warmest days, warmest nights, and coldest nights have shown significantly increasing trends except in the midland AEZ where warmest days decreased by 0.017°C/year (p<0.05). Temperature extreme’s magnitude of change is higher in the highland AEZ and lower in the midland AEZ. The trend in the daily temperature range shows statistically significant decrease across AEZs (p<0.05). A decreasing trend in the cold spell duration indicator was observed in all AEZs, and the magnitude of change is 0.667 days/year in lowland (p<0.001), 2.259 days/year in midland, and 1 day/year in highland (p<0.05). On the contrary, the number of very wet days revealed a positive trend both in the midland and highland AEZs (p<0.05). Overall, it is observed that warm extremes are increasing while cold extremes are decreasing, suggesting considerable changes in the AEZs.

scholarly journals Climate Variability and Farmers’ Perception in Southern Ethiopia

2019 ◽  
Vol 2019 ◽  
pp. 1-19 ◽  
Author(s):  
Befikadu Esayas ◽  
Belay Simane ◽  
Ermias Teferi ◽  
Victor Ongoma ◽  
Nigussie Tefera
Keyword(s):  
Climate Variability ◽  
Statistical Significance ◽  
Sampling Technique ◽  
Farm Households ◽  
Maximum Temperature ◽  
Southern Ethiopia ◽  
Positive Trend ◽  
Temperature And Precipitation ◽  
Annual Minimum Temperature ◽  
Binary Logit

The study aims to analyze climate variability and farmers’ perception in Southern Ethiopia. Gridded annual temperature and precipitation data were obtained from the National Meteorological Agency (NMA) of Ethiopia for the period between 1983 and 2014. Using a multistage sampling technique, 403 farm households were surveyed to substantiate farmers’ perceptions about climate variability and change. The study applied a nonparametric Sen’s slope estimator and Mann–Kendall’s trend tests to detect the magnitude and statistical significance of climate variability and binary logit regression model to find factors influencing farm households’ perceptions about climate variability over three agroecological zones (AEZs). The trend analysis reveals that positive trends were observed in the annual maximum temperature, 0.02°C/year (p<0.01) in the lowland and 0.04°C/year (p<0.01) in the highland AEZs. The positive trend in annual minimum temperature was consistent in all AEZs and significant (p<0.01). An upward trend in the annual total rainfall (10 mm/year) (p<0.05) was recorded in the midland AEZ. Over 60% of farmers have perceived increasing temperature and decreasing rainfall in all AEZs. However, farmers’ perception about rainfall in the midland AEZ contradicts with meteorological analysis. Results from the binary logit model inform that farmers’ climate change perceptions are significantly influenced by their access to climate and market information, agroecology, education, agricultural input, and village market distance. Based on these results, it is recommended to enhance farm households’ capacity by providing timely weather and climate information along with institutional actions such as agricultural extension services.

scholarly journals Analysis of changes in daily temperature and precipitation extreme in Jakarta on period of 1986-2014

2018 ◽  
Vol 229 ◽  
pp. 02017
Author(s):  
Aulia N. Khoir ◽  
R. Mamlu’atur ◽  
Agus Safril ◽  
Akhmad Fadholi
Keyword(s):  
Climate Change ◽  
Maximum Temperature ◽  
Temperature Index ◽  
Extreme Climate ◽  
Rainfall Index ◽  
Temperature And Precipitation ◽  
Precipitation Characteristics ◽  
Expert Team ◽  
Weather Stations ◽  
Climate Events

Climate change due to an increase in greenhouse gas concentrations has led to changes in extreme climate events. IPCC 2007 already predicted that average global temperatures would reach 0.74⁰ C in the last 100 years (1906-2005). A study on the temperature index trends and extreme precipitation in the period of 1986-2014 in Jakarta are represented by 5 weather stations. Daily of maximum temperature, minimum temperature, and precipitation data are calculated using RClimDex Software so that temperature and rainfall index data are obtained. The indexes are extreme climate indexes defined by ETCCDMI (Expert Team for Climate Change Detection Monitoring and Indices). The indexes consist of TN10p, TN90p, TX10p, TX90p, TNn, TNx, TXn, TXx, DTR, RX1day, RX5day, RCPTOT, CDD, CWD, and R95p. The purpose of this research is to know the change of temperature and precipitation characteristics from observation result in Jakarta by using index calculation. The results show that Jakarta has number of hot days according to the trends which are generally increasing. It can cause the temperature in Jakarta to get hotter. However, for the rainfall, the upward or downward trend is not significant, so it can be said there is no change in precipitation in Jakarta during 1986-2014.

scholarly journals Climatic variability at Gangtok and Tadong weather observatories in Sikkim, India, during 1961–2017

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Parvendra Kumar ◽  
Milap Chand Sharma ◽  
Rakesh Saini ◽  
Girish Kumar Singh
Keyword(s):  
Extreme Events ◽  
Climatic Variability ◽  
Eastern Himalaya ◽  
Data Series ◽  
Climatic Data ◽  
Positive Trend ◽  
Temperature And Precipitation ◽  
Cusum Charts ◽  
Slope Estimator ◽  
Maximum Temperatures

Abstract The present study documents the long-term trends in the temperature and precipitation of a poorly represented region, the Sikkim, eastern Himalaya using the Mann–Kendall non-parametric test and the Sen’s slope estimator. Additionally, the normal distribution curves and Cusum charts have been used to identify the shifts in extreme events and to detect the points of change in the climatic data series for robust analysis. The minimum temperatures recorded a positive trend in Gangtok (0.036 ˚C year−1 from 1961 to 2017) as well as in Tadong (0.065 ˚C year−1 from 1981 to 2010) stations, while the maximum temperatures showed no trend in Tadong station from 1981 to 2010 which is consistent with the trend in Gangtok station for the overlapped period. However, it was negative for the overall assessed period (− 0.027 ˚C year−1 from 1961 to 2017) in Gangtok. The average temperatures in Gangtok recorded no trend whereas a positive trend (0.035 ˚C year−1 from 1981 to 2010) was observed at Tadong station. A similar positive trend in the average temperatures has been detected at Gangtok also for the overlapped period. Accelerated warming was noticed during the last two decades with an increase in the probability of extreme events of temperatures (minimum, maximum, average) at the higher end. Precipitation was found to be more variable across the observed period and suggested no trend in the study area.

scholarly journals Projections for Mexico’s Tropical Rainforests Considering Ecological Niche and Climate Change

Forests ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 119
Author(s):  
Antonio Fidel Santos-Hernández ◽  
Alejandro Ismael Monterroso-Rivas ◽  
Diódoro Granados-Sánchez ◽  
Antonio Villanueva-Morales ◽  
Malinali Santacruz-Carrillo
Keyword(s):  
Climate Change ◽  
Ecological Niche ◽  
Potential Distribution ◽  
Tropical Rainforest ◽  
Statistical Significance ◽  
Climate Change Scenarios ◽  
Climate Conditions ◽  
Tropical Regions ◽  
Temperature And Precipitation ◽  
Ecological Importance

The tropical rainforest is one of the lushest and most important plant communities in Mexico’s tropical regions, yet its potential distribution has not been studied in current and future climate conditions. The aim of this paper was to propose priority areas for conservation based on ecological niche and species distribution modeling of 22 species with the greatest ecological importance at the climax stage. Geographic records were correlated with bioclimatic temperature and precipitation variables using Maxent and Kuenm software for each species. The best Maxent models were chosen based on statistical significance, complexity and predictive power, and current potential distributions were obtained from these models. Future potential distributions were projected with two climate change scenarios: HADGEM2_ES and GFDL_CM3 models and RCP 8.5 W/m2 by 2075–2099. All potential distributions for each scenario were then assembled for further analysis. We found that 14 tropical rainforest species have the potential for distribution in 97.4% of the landscape currently occupied by climax vegetation (0.6% of the country). Both climate change scenarios showed a 3.5% reduction in their potential distribution and possible displacement to higher elevation regions. Areas are proposed for tropical rainforest conservation where suitable bioclimatic conditions are expected to prevail.

scholarly journals Observed Trends in Indices of Daily Temperature Extremes in South America 1960–2000

2005 ◽  
Vol 18 (23) ◽  
pp. 5011-5023 ◽  
Author(s):  
L. A. Vincent ◽  
T. C. Peterson ◽  
V. R. Barros ◽  
M. B. Marino ◽  
M. Rusticucci ◽  
...  
Keyword(s):  
Climate Change ◽  
South America ◽  
Climate Extremes ◽  
Daily Temperature ◽  
Maximum Temperature ◽  
Daily Minimum Temperature ◽  
Daily Maximum Temperature ◽  
Daily Maximum ◽  
Temperature Extremes ◽  
Increasing Trends

Abstract A workshop on enhancing climate change indices in South America was held in Maceió, Brazil, in August 2004. Scientists from eight southern countries brought daily climatological data from their region for a meticulous assessment of data quality and homogeneity, and for the preparation of climate change indices that can be used for analyses of changes in climate extremes. This study presents an examination of the trends over 1960–2000 in the indices of daily temperature extremes. The results indicate no consistent changes in the indices based on daily maximum temperature while significant trends were found in the indices based on daily minimum temperature. Significant increasing trends in the percentage of warm nights and decreasing trends in the percentage of cold nights were observed at many stations. It seems that this warming is mostly due to more warm nights and fewer cold nights during the summer (December–February) and fall (March–May). The stations with significant trends appear to be located closer to the west and east coasts of South America.

Time To Relapse of Severe Acute Malnutrition And Its Determinants Among Children Treated In The Health Posts of Hadiya Zone, Southern Ethiopia.

2021 ◽  
Author(s):  
Abera Lambebo ◽  
Desselegn Temiru ◽  
Tefera Belachew
Keyword(s):  
Severe Acute Malnutrition ◽  
Statistical Significance ◽  
Acute Malnutrition ◽  
Southern Ethiopia ◽  
Under Five ◽  
Back Ground ◽  
Relapse Time ◽  
The Mean ◽  
Time To Relapse ◽  
Hadiya Zone

Abstract Back ground: In developing countries including Ethiopia, children under five years old are likely to suffer from repeated bouts of SAM. There is lack of study that documented time to relapse of SAM and its determinants. Objective: This study aimed to identify time of relapse and its determinants among children discharged after treatment for SAM in health facilities of Hadiya Zone, South, Ethiopia Methods: An institution based retrospective cohort study was carried out from data spanning from 2014/2015 to 2019/2020. After checking all the assumptions, multivariable CPH model was fitted to isolate independent determinants of time to relapse. All tests were two sided and statistical significance at P values <0.05. Result: The mean(±SD) time for relapse of SAM among under five children was 22(±9.9) weeks from discharge to relapse time. On multivariable CPH model, the hazard of relapse for SAM was significantly higher for children who had edema (AHR =2.02 ,95%, CI: 1.17-3.50), age of 6-11 months (AHR = 5.2, 95%, CI:1.95-13.87), had discharge low MUAC (AHR = 12,95%, CI: 7.90-19.52)Concussion: The finding showed that children discharged from SAM are likely to have relapse in 3 weeks.

Willingness of antenatal care attendees towards voluntary HIV counseling and testing, Southern Ethiopia

2020 ◽  
Vol 6 (4) ◽  
pp. 104-112
Author(s):  
Sintayehu Assefa ◽  
Dubale Dulla
Keyword(s):  
Antenatal Care ◽  
Pregnant Women ◽  
Information Dissemination ◽  
Statistical Significance ◽  
Southern Ethiopia ◽  
Cross Sectional ◽  
Care Clinic ◽  
Hiv Counseling And Testing ◽  
Hiv Counseling ◽  
Counseling And Testing

Background: Voluntary counseling and testing (VCT) is an entry point for the prevention of HIV transmission from mother to child and accessing VCT benefit from PMTCT services. Even though, some pregnant women clearly know the benefits /advantages of PMTCT services, they are not willing to test and access the services. Hence, this study was aimed to assess the willingness of pregnant women attending antenatal care towards VCT/PMTCT at Adare general hospital in southern Ethiopia. Method: An institution-based cross-sectional study was conducted at Hawassa Adare hospital, southern Ethiopia from February to April/2018. A total of 338 randomly selected pregnant women who were attending antenatal care clinic were included. Data was collected using structured and pretested questionnaire; entered and analyzed using SPSS version 20 computer software. Important descriptive and logistic models were used for data analysis assuming statistical significance at p < 0.05. Result: A total of 338 mothers were interviewed with a response rate of 100%. The willingness towards voluntary HIV counseling and testing among study participants was 82.2%. Participants who attended primary and High school and above were 3.9 (AOR= 3.87, 95% CI- 1.705, 8.782) and 9.5 times (AOR 9.53 at 95% CI- 3.155, 28.76); those who had good knowledge about VCT/PMTCT were 3.47 times (AOR=3.47, 95% CI-1.721, 7.003); women who followed two to three ANC visit, were 5.1 times more likely have willingness towards VCT/PMTCT (AOR 5.11 at 95% CI -1.095, 23.81) more likely willing to be tested than their counterparts respectively. Conclusion: Willingness towards voluntary HIV counseling was encouraging however it needs advancement. Since boosted knowledge and awareness promote willingness to VCT/PMTCT uptakes, initiation of community-based information dissemination, increased quality of ANC service, and empowering women to be educated could be effective in order to promote high VCT and PMTCT program uptakes

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