Excitations of the Earth and Mars’ Variable Rotations by Surficial Fluids

The dynamic interactions that occur between the solid Earth and surficial fluids are related globally by conservation of angular momentum in the Earth system. Owing to this condition, the surficial fluids have shown to be main excitation sources of the Earth&#8217;s variable rotation on timescales between a few days and several years. Likewise, the Mars&#8217; rotation changes due to variations of atmospheric circulation and surface pressure, and the variable Martian polar ice caps associated with the CO2 sublimation/condensation effects. Investigations of the Earth and Mars&#8217; rotations by surficial fluids may further our understandings of the Earth and planetary global dynamics. Here, we present our recent progresses on excitations of the Earth and Mars&#8217; rotational variations on multiple time scales: (1) differences between the NCEP/NCAR and ECMWF atmospheric excitation functions of the Earth&#8217;s rotation, and (2) the Mars&#8217; rotational variations and the dust cycles during the Mars Years 24-31.

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Preface

Philosophical Transactions of the Royal Society B Biological Sciences ◽

10.1098/rstb.1993.0104 ◽

1993 ◽

Vol 341 (1297) ◽

pp. 205-205

Keyword(s):

Global Change ◽

Sea Level ◽

Flowering Plants ◽

Polar Ice ◽

Ice Caps ◽

Earth Systems ◽

The Earth ◽

Commercially Important ◽

Geologic Data ◽

And Sea Level

The climate of the Earth has undergone m any changes and for those times when geologic data are widespread and abundant the Mesozoic appears to have been one of the warmest intervals. This was a time during which the single continent Pangea disintegrated into continental units similar to those of today, a time when there were no significant polar ice caps and sea level was generally much higher than at the present time, and a time when dinosaurs apparently dominated terrestrial faunas and the flowering plants evolved. Understanding this alien world, ancestral to ours, is intrinsically interesting, intellectually challenging, and offers opportunities for more effective targeting of sites where commercially important geological resources may be found. It also provides critical insights into the operation of coupled Earth systems (biospheric, atmospheric, hydrospheric and geospheric) under extreme ‘greenhouse’ conditions, and therefore may have relevance to possible future global change.

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River Pollution: Big Cost of Future (Light on Mumbai Metropolis Rivers)

Thematics Journal of Geography ◽

10.26643/tjg.v8i8.8135 ◽

2019 ◽

Vol 8 (8) ◽

pp. 86-90

Author(s):

Chinmay . M ◽

Leena Muralidharan ◽

Sangeeta Gaur

Keyword(s):

Water Quality ◽

Environmental Health ◽

Fresh Water ◽

Well Being ◽

River Pollution ◽

Polar Ice ◽

Recreational Activities ◽

Ice Caps ◽

The Earth ◽

Health And Well Being

Water is one of necessity of life without which it is not possible for life to sustain. Approximately 71% part of the earth is enclosed with water in which 97% seawater, 2% polar ice caps, and 1% is fresh water. Water quality is an indicator of environmental health and well being of society. The environment nearby river area are very productive, beside this they also have economically values for fisheries, tourism, and recreational activities (Donde and Patil, 2018). In India, approximately 1000 rivers are present which are source of livelihood for large number of population.

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New insights about the processes leading to marine extinction at the K-Pg boundary using a coupled biogeochemical-ecosystem model

10.5194/egusphere-egu2020-20315 ◽

2020 ◽

Author(s):

Le Hir Guillaume ◽

fluteau fréderic ◽

Hennequin Salome ◽

Goddéris Yves

Keyword(s):

Ecological Model ◽

Abiotic Factors ◽

Marine Organisms ◽

Multiple Time Scales ◽

Multiple Time ◽

Ecosystem Structure ◽

Deccan Volcanism ◽

The Earth ◽

Chicxulub Impact ◽

The Impact

If most experts agree that the Cretaceous-Paleogene (K-Pg) extinction (66 Ma) resulted from a combination of the Chicxulub impact and of Deccan volcanism, the chain of reactions (Bond and Wignall, 2014) leading to the extinction is not well constrained.&#160; &#160; &#160;In the present study, we use the GEOCLIM model to explore extreme perturbations induced by the two events and to investigate processes leading to the marine extinction. This state-of-the-art numerical tool (geoclimmodel.wordpress.com) includes in particular a marine ecological model in which food webs are simulated and marine organisms are sensitive to abiotic factors of their environment. The characteristics of each &#8220;species&#8221; of marine organisms, such as the tolerance to pH or temperature changes or the efficiency of predation, are randomly fixed to avoid any determinism in the response to the environmental perturbations.&#160;&#160; The response of the Earth system to the onset of Deccan traps and to the Chicxulub impact is explored by forcing the model with the most recent &#8220;eruptive sequences&#8221; &#160;(Schoene et al., 2019, Sprain et al. 2019) and with the assumption of a pulse-like degassing (Chenet et al. 2009) sequence over 500 kyrs that includes CO2 and SO2. This new approach allows us to take into account the interplays between the sulfur and carbon cycles on multiple time scales (from year to 105 &#160;yrs) and to capture the model sensitivity to the uncertainties in atmospheric emissions (duration, timing, nature of gases, intensity of pulses, intensity of the impact).&#160; The coupled evolution of the Earth&#8217;s climate and oceanic geochemistry during the K-Pg boundary crisis will be presented. Without considering evolution processes, the biotic response (biomass and biodiversity) will be discussed with respect to the ecosystem structure existing before the perturbations.&#160;

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Earth system data cubes unravel global multivariate dynamics

10.5194/esd-2019-62 ◽

2019 ◽

Cited By ~ 2

Author(s):

Miguel D. Mahecha ◽

Fabian Gans ◽

Gunnar Brandt ◽

Rune Christiansen ◽

Sarah E. Cornell ◽

...

Keyword(s):

Data Streams ◽

Multiple Time Scales ◽

Earth System ◽

Model Data ◽

Data Cubes ◽

Intensive Research ◽

Data Intensive ◽

The Earth ◽

System Data ◽

Multiple Variables

Abstract. Understanding Earth system dynamics in the light of ongoing human intervention and dependency remains a major scientific challenge. The unprecedented availability of data streams describing different facets of the Earth now offers fundamentally new avenues to address this quest. However, several practical hurdles, especially the lack of data interoperability, limit the joint potential of these data streams. Today many initiatives within and beyond the Earth system sciences are exploring new approaches to overcome these hurdles and meet the growing inter-disciplinary need for data-intensive research; using data cubes is one promising avenue. Here, we introduce the concept of Earth system data cubes and how to operate on them in a formal way. The idea is that treating multiple data dimensions, such as spatial, temporal, variable, frequency and other grids alike, allows effective application of user-defined functions to co-interpret Earth observations and/or model-data. An implementation of this concept combines analysis-ready data cubes with a suitable analytic interface. In three case studies we demonstrate how the concept and its implementation facilitate the execution of complex workflows for research across multiple variables, spatial and temporal scales: (1) summary statistics for ecosystem and climate dynamics; (2) intrinsic dimensionality analysis on multiple time-scales; and (3) data-model integration. We discuss the emerging perspectives for investigating global interacting and coupled phenomena in observed or simulated data. Latest developments in machine learning, causal inference, and model data integration can be seamlessly implemented in the proposed framework, supporting rapid progress in data-intensive research across disciplinary boundaries.

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Climate Change and Impacts of Extreme Events on Human Health: An Overview

Indonesian Journal of Social and Environmental Issues (IJSEI) ◽

10.47540/ijsei.v2i1.180 ◽

2020 ◽

Vol 2 (1) ◽

pp. 68-77

Author(s):

Aadil Gulzar ◽

Tajamul Islam ◽

Ruquia Gulzar ◽

Tabasum Hassan

Keyword(s):

Heat Waves ◽

Dust Storms ◽

Water Quantity ◽

Polar Ice ◽

Sea Levels ◽

Know How ◽

Ice Caps ◽

The Earth ◽

Tick Borne Encephalitis ◽

Reduced Water

The causes of climate patchy rope in heat up temperature, change in precipitation, degree of utmost conditions occasions like melting of glaciers, polar ice-caps, mount in sea levels, etc. These impacts eventually fall our income by touching the rations we eat, the water we drink, the air we breathe and the earth somewhere we live. Frequent impacts caused fitting to excessive exposure of heat waves such as round stroke, dehydration, cardiovascular, respiratory and neural comborbidities. Climate conversion alters the ecology of vectors and these vectors are capable of have in stock causal agents such as viruses, bacteria and protozoa from animals to humans. Malaria, tick-borne encephalitis, fair fever, plague, and dengue obtain lengthened their geographical ranges as their carriers migrated to privileged latitudes. Droughts canister take part in adverse property on being health, as they over and over again suggest itself in mishmash with other sit out conditions, such as warm waves, wildfires and dust storms. Reduced water quantity may cause decreased water flow during periods of drought, encouraging the development of pathogens which prefer dry, stagnant environments. Altering climatic situation know how to be attributed to mounting international temperatures, spread in the dimensions of ambient fill up fumes and changes in the announce motion as mutual together. Extreme season and climate-related actions are famous to set off fundamental infrastructure failures, lucrative harm and relocation of communities, ensuing in a quantity of health problems.

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