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| http://dx.doi.org/10.1073/pnas.1610455113 | DOI Listing |
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Polarity transitions of narrow bipolar events in thundercloud tops reaching the lower stratosphere.
Nat Commun
August 2024
CAS Key Laboratory of Geospace Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China.
Blue corona discharges are often generated in thunderclouds penetrating into the stratosphere and are the optical manifestation of narrow bipolar events (NBEs) observed in radio signals. While their production appears to depend on convection, the cause and nature of such discharges are not well known. Here we show the observations by a lightning detection array of unusual amounts of 982 NBEs during a tropical storm on the coastline of China.
View Article and Find Full Text PDFAssociation of lightning with LCL, EL, humidity at 850 mb and at 200 mb during various CAPE, over northern India.
Sci Total Environ
March 2024
Indian Institute of Tropical Meteorology, Pune, India.
Association of lightning with Lifting Condensation Level (LCL), Equilibrium Level (EL), K Index, and humidity at 850 mb and 200 mb in 2019 and 2020 over National Capital Region (Delhi) (Lat: 27°N -29°N, Lon: 76°E-78°E) is investigated using in-situ observation data. Study shows high lightning activity during low LCL, and vice versa. This high lighting and low LCL is associated with high relative humidity at 850 mb, and high "K" index.
View Article and Find Full Text PDFMale-biased stone tool use by wild white-faced capuchins (Cebus capucinus imitator).
Am J Primatol
April 2024
Department for the Ecology of Animal Societies, Max Planck Institute of Animal Behavior, Konstanz, Germany.
Tool-using primates often show sex differences in both the frequency and efficiency of tool use. In species with sex-biased dispersal, such within-group variation likely shapes patterns of cultural transmission of tool-use traditions between groups. On the Panamanian islands of Jicarón and Coiba, a population of white-faced capuchins (Cebus capucinus imitator)-some of which engage in habitual stone tool use-provide an opportunity to test hypotheses about why such sex-biases arise.
View Article and Find Full Text PDFExploring the predation of large land snails using preyed shell remains from rock anvil sites in a tropical limestone rainforest in Malaysia.
Biodivers Data J
September 2022
Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia Institute for Tropical Biology and Conservation, Universiti Malaysia Sabah Kota Kinabalu Malaysia.
The study of prey-predator interactions between land snails and birds offers important insights into evolutionary and ecological relationships. Here, we report a case study of rock anvils presumably used by the birds and in a cave cavity of a limestone hill in Malaysia. We did not detect any other species in the plots and, therefore, based on our short study duration, we cannot rule out the possibility that other species, such as mammals, preyed on the snails.
View Article and Find Full Text PDFClouds and Convective Self-Aggregation in a Multimodel Ensemble of Radiative-Convective Equilibrium Simulations.
J Adv Model Earth Syst
September 2020
NOAA/Geophysical Fluid Dynamics Laboratory Princeton NJ USA.
The Radiative-Convective Equilibrium Model Intercomparison Project (RCEMIP) is an intercomparison of multiple types of numerical models configured in radiative-convective equilibrium (RCE). RCE is an idealization of the tropical atmosphere that has long been used to study basic questions in climate science. Here, we employ RCE to investigate the role that clouds and convective activity play in determining cloud feedbacks, climate sensitivity, the state of convective aggregation, and the equilibrium climate.
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