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1,109 results on '"Savin S."'

1. An update on the influence of natural climate variability and anthropogenic climate change on tropical cyclones

Author

Suzana J. Camargo, Hiroyuki Murakami, Nadia Bloemendaal, Savin S. Chand, Medha S. Deshpande, Christian Dominguez-Sarmiento, Juan Jesús González-Alemán, Thomas R. Knutson, I.-I. Lin, Il-Ju Moon, Christina M. Patricola, Kevin A. Reed, Malcolm J. Roberts, Enrico Scoccimarro, Chi Yung (Francis) Tam, Elizabeth J. Wallace, Liguang Wu, Yohei Yamada, Wei Zhang, and Haikun Zhao

Subjects
Physical geography, GB3-5030, Environmental sciences, GE1-350
Abstract

A substantial number of studies have been published since the Ninth International Workshop on Tropical Cyclones (IWTC-9) in 2018, improving our understanding of the effect of climate change on tropical cyclones (TCs) and associated hazards and risks. These studies have reinforced the robustness of increases in TC intensity and associated TC hazards and risks due to anthropogenic climate change. New modeling and observational studies suggested the potential influence of anthropogenic climate forcings, including greenhouse gases and aerosols, on global and regional TC activity at the decadal and century time scales. However, there are still substantial uncertainties owing to model uncertainty in simulating historical TC decadal variability in the Atlantic, and the limitations of observed TC records. The projected future change in the global number of TCs has become more uncertain since IWTC-9 due to projected increases in TC frequency by a few climate models. A new paradigm, TC seeds, has been proposed, and there is currently a debate on whether seeds can help explain the physical mechanism behind the projected changes in global TC frequency. New studies also highlighted the importance of large-scale environmental fields on TC activity, such as snow cover and air-sea interactions. Future projections on TC translation speed and medicanes are new additional focus topics in our report. Recommendations and future research are proposed relevant to the remaining scientific questions and assisting policymakers.

Published
2023
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4. Specific Energy Absorbed by Fiber-Reinforced Concrete Under Static and Dynamic Loading

Author

Savin, S., Sharipov, M., di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Cui, Zhen-Dong, Series Editor, Radionov, Andrey A., editor, Ulrikh, Dmitrii V., editor, Timofeeva, Svetlana S., editor, Alekhin, Vladimir N., editor, and Gasiyarov, Vadim R., editor

Published
2024
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6. Declining tropical cyclone frequency under global warming

Author

Chand, Savin S, Walsh, Kevin JE, Camargo, Suzana J, Kossin, James P, Tory, Kevin J, Wehner, Michael F, Chan, Johnny CL, Klotzbach, Philip J, Dowdy, Andrew J, Bell, Samuel S, Ramsay, Hamish A, and Murakami, Hiroyuki

Subjects
Climate Action, Atmospheric Sciences, Physical Geography and Environmental Geoscience, Environmental Science and Management
Abstract

Assessing the role of anthropogenic warming from temporally inhomogeneous historical data in the presence of large natural variability is difficult and has caused conflicting conclusions on detection and attribution of tropical cyclone (TC) trends. Here, using a reconstructed long-term proxy of annual TC numbers together with high-resolution climate model experiments, we show robust declining trends in the annual number of TCs at global and regional scales during the twentieth century. The Twentieth Century Reanalysis (20CR) dataset is used for reconstruction because, compared with other reanalyses, it assimilates only sea-level pressure fields rather than utilize all available observations in the troposphere, making it less sensitive to temporal inhomogeneities in the observations. It can also capture TC signatures from the pre-satellite era reasonably well. The declining trends found are consistent with the twentieth century weakening of the Hadley and Walker circulations, which make conditions for TC formation less favourable.

Published
2022

8. Significant Contribution of Projectile Excited States to the Stopping of Slow Helium Ions in Hydrogen Plasma

Author

Zhao, Y. T., Zhang, Y. N., Cheng, R., He, B., Liu, C. L., Zhou, X. M., Lei, Y., Wang, Y. Y., Ren, J. R., Wang, X., Chen, Y. H., Xiao, G. Q., Savin, S. M., Gavrilin, R., Golubev, A. A., and Hoffmann, D. H. H.

Subjects
Physics - Plasma Physics
Abstract

The energy deposition and the atomic processes, such as the electron-capture, ionization, excitation and radiative-decays for slow heavy ions in plasma remains an unsolved fundamental problem. Here we investigate, both experimentally and theoretically, the stopping of 100 keV=u helium ions in a well-defined hydrogen plasma. Our precise measurements show a much higher energy loss than the predictions of the semi-classical approaches with the commonly used effective charge. By solving the Time Dependent Rate Equation (TDRE) with all the main projectile states and for all relevant atomic processes, our calculations are in remarkable agreement with the experimental data. We also demonstrated that, acting as a bridge for electron-capture and ionization, the projectile excited states and their radiative decays can remarkably influence the equilibrium charge states and consequently lead to a substantial increasing of the stopping of ions in plasma.

Published
2020
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9. Area of a triangle and angle bisectors

Author

Buturlakin, A. A., Presnyakov, S. S., Revin, D. O., and Savin, S. A.

Subjects
Mathematics - Group Theory, 51M04, 12F10
Abstract

Consider a triangle $ABC$ with given lengths $l_a,l_b,l_c$ of its internal angle bisectors. We prove that in general, it is impossible to construct a square of the same area as $ABC$ using a ruler and compass. Moreover, it is impossible to express the area of $ABC$ in radicals of $l_a,l_b,l_c$.

Published
2020
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10. An update on the influence of natural climate variability and anthropogenic climate change on tropical cyclones

Author

Camargo, Suzana J., Murakami, Hiroyuki, Bloemendaal, Nadia, Chand, Savin S., Deshpande, Medha S., Dominguez-Sarmiento, Christian, González-Alemán, Juan Jesús, Knutson, Thomas R., Lin, I.-I., Moon, Il-Ju, Patricola, Christina M., Reed, Kevin A., Roberts, Malcolm J., Scoccimarro, Enrico, Tam, Chi Yung (Francis), Wallace, Elizabeth J., Wu, Liguang, Yamada, Yohei, Zhang, Wei, and Zhao, Haikun

Published
2023
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18. Influence of Shear Deformations on the Buckling of Reinforced Concrete Elements

Author

Savin, S. Yu., di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, Klyuev, Sergey Vasil'yevich, editor, Klyuev, Alexander Vasil'yevich, editor, and Vatin, Nikolay Ivanovich, editor

Published
2021
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26. Comparison оf Secondary Nucleation Processes during Diamond Synthesis in Microwave Plasma in H2–CH4–N2 and H2–CH4–NH3 Gas Mixtures.

Author

Martyanov, A. K., Tyazhelov, I. A., Popovich, A. F., Ralchenko, V. G., Savin, S. S., and Sedov, V. S.

Abstract

For the first time, the secondary diamond nucleation processes are compared during the growth of polycrystalline diamond films by the MPCVD method with addition of nitrogen and ammonia. An ammonia molecule (NH3) has a lower ionization energy than a nitrogen molecule (N2) in microwave plasma. It has been established that when using ammonia, the transition to the nanocrystalline structure of diamond occurs at significantly lower concentrations than when using nitrogen. [ABSTRACT FROM AUTHOR]

Published
2024
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45. Corrigendum

Author

Soubhik Biswas, Savin S. Chand, Andrew J. Dowdy, Wendy Wright, Cameron Foale, Xiaohui Zhao, and Anil Deo

Subjects
Atmospheric Science
Published
2023

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