Article
Green & Sustainable Science & Technology
Jiwei Sun, Shuoben Bi, Bashar Bashir, Zhangxi Ge, Kexin Wu, Abdullah Alsalman, Brian Odhiambo Ayugi, Karam Alsafadi
Summary: Against the backdrop of global climate change, this study examines the dynamics of drought characteristics in China from 1951 to 2020. Precipitation data from 700 meteorological stations were analyzed using SPI-12 and SPEI-12 to detect drought characteristics. The findings reveal that drought-prone areas in China are expanding, with the most severe drought event occurring in 2010-2011. The frequency of drought occurrence gradually decreases from south to north, but areas with less frequent droughts experience longer and more severe drought durations.
Article
Meteorology & Atmospheric Sciences
Sergio M. Vicente-Serrano, Fernando Dominguez-Castro, Conor Murphy, Jamie Hannaford, Fergus Reig, Dhais Pena-Angulo, Yves Tramblay, Ricardo M. Trigo, Neil Mac Donald, M. Yolanda Luna, Mark Mc Carthy, Gerard Van der Schrier, Marco Turco, Dario Camuffo, Ivan Noguera, Ricardo Garcia-Herrera, Francesca Becherini, Antonio Della Valle, Miquel Tomas-Burguera, Ahmed El Kenawy
Summary: The study reveals that there is a general absence of statistically significant long-term trends in meteorological droughts across Western Europe, with some exceptions at specific stations. The spatial diversity of drought variability in Western Europe is strong, showing homogeneous temporal evolution in different regions. The temporal variability of drought in Western Europe is more dominant than long-term trends, indicating that long-term drought trends cannot be confirmed solely using precipitation records.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Rhoda A. Odongo, Hans De Moel, Anne F. Van Loon
Summary: This study characterizes droughts and their propagation in the Horn of Africa region, focusing on meteorological, soil moisture, and hydrological droughts. The results show that the characteristics and propagation of droughts vary depending on factors such as soil properties, vegetation types, and geology. Different drought metrics are important for forecasting and management efforts in different regions.
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
(2023)
Article
Agronomy
Ning Yao, Yi Li, Qingzhu Liu, Siyuan Zhang, Xinguo Chen, Yadong Ji, Fenggui Liu, Alim Pulatov, Puyu Feng
Summary: This study investigated the impact of drought on crop yields from multiple perspectives and identified key parameters for drought prevention measures. The results showed that different crops have varying key parameters for drought prevention, and multivariable linear equations can effectively describe the relationship between crop yield and drought indices.
AGRICULTURAL WATER MANAGEMENT
(2022)
Article
Meteorology & Atmospheric Sciences
Kyungmin Sung, James H. Stagge
Summary: The study addresses the complexity of analyzing meteorological drought trends by considering both seasonal patterns and long-term trends. The results identify clear regions based on precipitation seasonality, while showing that long-term trends do not align with the seasonality. The study's clustering analysis based on nonstationary meteorological drought trends can be valuable for informing water management strategies.
JOURNAL OF CLIMATE
(2022)
Article
Geosciences, Multidisciplinary
Wenwen Guo, Shengzhi Huang, Yong Zhao, Guoyong Leng, Xianggui Zhao, Pei Li, Mingqiu Nie, Qiang Huang
Summary: It is important to study the effects of meteorological factors on drought dynamic in order to understand the drought formation mechanism and develop climate change adaptation strategies. However, existing studies have overlooked the nonlinear characteristics and complex interactions of meteorological factors, hindering accurate forecasting and understanding of drought formation mechanism. This study proposes a new framework for quantifying drought dynamics, considering the nonlinear trends and interactions of meteorological factors. The findings provide valuable insights into the nonlinear effects of meteorological factors on drought dynamics, contributing to the understanding of drought formation mechanism and providing scientific support for drought early warning systems.
Article
Meteorology & Atmospheric Sciences
Uttam Singh, Pooja Agarwal, Pramod Kumar Sharma
Summary: Climate change adversely affects the development, management, and planning of surface and groundwater resources; monitoring and minimizing drought is crucial for analyzing and predicting its impacts; among the seven drought indices considered in this study, the Standardized Precipitation Index (SPI) showed the highest correlation values with different time steps.
THEORETICAL AND APPLIED CLIMATOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Rizwan Niaz, Muhammad Ahmad Raza, Mohammed M. A. Almazah, Ijaz Hussain, A. Y. Al-Rezami, Mohammed M. Ali Al-Shamiri
Summary: Drought, resulting from a lack of precipitation, is a multifaceted environmental disaster with potential impacts on people's lives, the economy, and environmental resources. Understanding seasonal drought frequency and persistence is crucial for mitigating its negative effects. This study examines the frequency and persistence of meteorological drought at selected stations using the Proportional Odds Model (POM) and finds significant relationships between drought and precipitation index in different seasons. The findings provide important insights for early warning systems, drought risk assessment and management, and drought reduction planning.
GEOMATICS NATURAL HAZARDS & RISK
(2022)
Article
Environmental Sciences
Ahmed Elbeltagi, Chaitanya B. B. Pande, Manish Kumar, Abebe Debele Tolche, Sudhir Kumar Singh, Akshay Kumar, Dinesh Kumar Vishwakarma
Summary: This study aims to predict meteorological drought events in the central India of Maharashtra state using machine learning algorithms. Random forest, random tree, and Gaussian process regression models were tested, and the results showed that the random forest model performed the best in forecasting drought events.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Agronomy
Robert Kalbarczyk, Eliza Kalbarczyk
Summary: This study examines the diversity of seasonal meteorological drought in Poland using monthly precipitation data from 74 meteorological stations. The results show that meteorological drought occurs more frequently in spring and autumn in Poland, and areas affected by extreme drought experience below-average precipitation. The study also finds a significant negative correlation between the size of the affected area and the standardized precipitation index.
Article
Environmental Sciences
Xiaohu Zhao, Guohe Huang, Yongping Li, Qianguo Lin, Junliang Jin, Chen Lu, Junhong Guo
Summary: Future changes in meteorological droughts in Henan Province, China show increased duration and intensity while decreased frequency. This study also finds differences in drought changes among different emission scenarios, with the SSP2-4.5 scenario showing lower magnitudes of changes in duration and intensity relative to other scenarios.
JOURNAL OF CONTAMINANT HYDROLOGY
(2021)
Article
Engineering, Civil
L. Vergni, A. Vinci, F. Todisco
Summary: This study tested and compared several standardized meteorological indices in identifying agricultural drought impacts in central Italy, with SDDI and SPEI showing slightly better performance and potential in assessing drought impacts.
JOURNAL OF HYDROLOGY
(2021)
Article
Meteorology & Atmospheric Sciences
Ren Wang, Longhui Li, Lijuan Chen, Liang Ning, Linwang Yuan, Guonian Lu
Summary: Climate change has led to an increase in drought in most global land areas. The contributions of decreased precipitation and increased potential evapotranspiration to long-term drought duration and intensity vary by region, but overall, changes in precipitation play a more significant role in the increase of long-term drought.
INTERNATIONAL JOURNAL OF CLIMATOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Brian Ayugi, Zablon Weku Shilenje, Hassen Babaousmail, Kenny T. C. Lim Kam Sian, Richard Mumo, Victor Nnamdi Dike, Vedaste Iyakaremye, Abdelghani Chehbouni, Victor Ongoma
Summary: The ongoing global warming has led to an increase in extreme weather events, especially drought, in East Africa. This study investigates future changes in drought events using CMIP6 data, and finds that precipitation will increase in most parts of East Africa, but decrease in arid regions. This will result in more frequent and intense drought events in the future. Early preparation for these drought events is crucial.
Article
Multidisciplinary Sciences
Felicia Chiang, Omid Mazdiyasni, Amir AghaKouchak
Summary: Most studies have focused on the impacts of human activity on mean or extreme climate variables and neglected exploring drought characteristics. The research demonstrates that human activity has increased the frequency, duration, and intensity of drought events globally.
NATURE COMMUNICATIONS
(2021)
Article
Geosciences, Multidisciplinary
Shivaprasad S. Sharma, Parth Sarathi Roy, V Chakravarthi, Srinivasa Rao
GEOMATICS NATURAL HAZARDS & RISK
(2018)
Article
Biodiversity Conservation
Reshma M. Ramachandran, Parth Sarathi Roy, V. Chakravarthi, J. Sanjay, Pawan K. Joshi
ECOLOGICAL INDICATORS
(2018)
Article
Remote Sensing
Ramesh K. Ningthoujam, P. K. Joshi, P. S. Roy
INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
(2018)
Article
Geosciences, Multidisciplinary
Pulakesh Das, Mukunda Dev Behera, Nitesh Patidar, Bhabagrahi Sahoo, Poonam Tripathi, Priti Ranjan Behera, S. K. Srivastava, Partha Sarathi Roy, Praveen Thakur, S. P. Agrawal, Y. V. N. Krishnamurthy
JOURNAL OF EARTH SYSTEM SCIENCE
(2018)
Article
Environmental Sciences
Rajendra Mohan Panda, Mukunda Dev Behera, Partha Sarathi Roy
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2018)
Article
Environmental Sciences
M. D. Behera, P. Tripathi, P. Das, S. K. Srivastava, P. S. Roy, C. Joshi, P. R. Behera, J. Deka, P. Kumar, M. L. Khan, O. P. Tripathi, T. Dash, Y. V. N. Krishnamurthy
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2018)
Article
Engineering, Electrical & Electronic
Sandip Sankar Roy, Chinmoy Saha, Tammana Nagasekhar, Sandesh Bhimrao Mane, C. S. Padmavathy, G. Umadevi, Mallenahalli Naresh Kumar
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2019)
Article
Meteorology & Atmospheric Sciences
Naresh K. Mallenahalli
THEORETICAL AND APPLIED CLIMATOLOGY
(2020)
Article
Environmental Sciences
Preet Lal, Amit Kumar, Alisha Prasad, Shubham Kumar, Purabi Saikia, Arun Dayanandan, Parth Sarathi Roy, Mohammed Latif Khan
Summary: The study found that while the COVID-19 high and very high-risk primarily concentrated in limited areas, the proportion of high to very high-risk was evident in larger regions. Most parts of India exhibited moderate to very high socio-economic vulnerability, with districts containing megacities being severely affected due to complex urban and social systems.
GEOCARTO INTERNATIONAL
(2022)
Article
Environmental Sciences
Beependra Singh, Chockalingam Jeganathan, Virendra Singh Rathore, Mukunda Dev Behera, Chandra Prakash Singh, Parth Sarathi Roy, Peter M. Atkinson
Summary: This study conducted an analysis of the spatio-temporal pattern of natural vegetation and the impact of rainfall on forest growth in central India using satellite remote sensing data. The research found that most forested areas in Central India have shown a greening trend in recent years, with significant impacts observed in certain years of drought and surplus rainfall.
Article
Environmental Sciences
Swapna Mahanand, Mukunda Dev Behera, Partha Sarathi Roy
Summary: The spectral information derived from satellite data is important for assessing plant diversity. This study examined the suitability of satellite-derived biophysical proxies for assessing and monitoring plant diversity in different biogeographic regions of India. The results showed that FAPAR is a potentially essential biodiversity variable for rapid assessment of plant diversity in these regions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Sujit M. Ghosh, Mukunda D. Behera, Subham Kumar, Pulakesh Das, Ambadipudi J. Prakash, Prasad K. Bhaskaran, Parth S. Roy, Saroj K. Barik, Chockalingam Jeganathan, Prashant K. Srivastava, Soumit K. Behera
Summary: This study presents a novel approach using random forest to estimate forest canopy height in India. The results show that the majority of India's forests have canopy heights between 10-20 meters, indicating mature forest vegetation. This study highlights the importance of using GEDI data to assess canopy height, particularly in data-deficit mountainous regions.
Article
Computer Science, Information Systems
Sandip Sankar Roy, T. Nagasekhar, Chinmoy Saha, Sandesh Bhimrao Mane, Mir M. Sardar, C. S. Padmavathy, G. Umadevi, Naresh M. Kumar
Summary: This article reports the design and realization of a dual band, dual polarized composite monopulse tracking feed, which covers S-band and X-band. The composite feed has high illumination efficiency and has been successfully installed in an antenna system.
Article
Computer Science, Information Systems
Sandip Sankar Roy, Chinmoy Saha, Naresh Kumar Mallenahalli, Debdeep Sarkar
Summary: A wideband notched filtering horn antenna integrated with a linear array of C-SRRs is proposed in this article, providing strong rejection-band capabilities. The staggered arrangement of multiple C-SRRs allows for wideband notch filtering response. The proposed antenna maintains the impedance and radiation characteristics of the standalone horn antenna in the pass band while efficiently suppressing co- and cross-polar peaks in the notch-band.
Proceedings Paper
Geosciences, Multidisciplinary
Naresh K. Mallenahalli, Hari Priya Sakethapuram
2019 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS 2019)
(2019)
