scholarly journals Recent evidence for warmer and drier growing seasons in climate sensitive regions of Central America from multiple global data sets

2021 ◽  
Author(s):  
IT Stewart ◽  
EP Maurer ◽  
K Stahl ◽  
K Joseph
Keyword(s):  
Central America ◽  
Data Sets ◽  
Growing Seasons ◽  
Global Data Sets ◽  
Global Data

Advanced Geodynamics

2021 ◽  
Author(s):  
David T. Sandwell
Keyword(s):  
Plate Tectonics ◽  
Driving Forces ◽  
Data Sets ◽  
Earthquake Cycle ◽  
Mathematical Methods ◽  
Graduate Course ◽  
Field Development ◽  
Linear Partial Differential Equations ◽  
Global Data Sets ◽  
Global Data

David Sandwell developed this advanced textbook over a period of nearly 30 years for his graduate course at Scripps Institution of Oceanography. The book augments the classic textbook Geodynamics by Don Turcotte and Jerry Schubert, presenting more complex and foundational mathematical methods and approaches to geodynamics. The main new tool developed in the book is the multi-dimensional Fourier transform for solving linear partial differential equations. The book comprises nineteen chapters, including: the latest global data sets; quantitative plate tectonics; plate driving forces associated with lithospheric heat transfer and subduction; the physics of the earthquake cycle; postglacial rebound; and six chapters on gravity field development and interpretation. Each chapter has a set of student exercises that make use of the higher-level mathematical and numerical methods developed in the book. Solutions to the exercises are available online for course instructors, on request.

scholarly journals DYNAMIC OF LAND DEGRADATION NEUTRALITY BASELINE INDCATORS IN THE REPUBLIC OF MACEDONIA

2019 ◽  
Vol 40 (1) ◽  
pp. 39
Author(s):  
Dusko Mukaetov Mukaetov ◽  
Ivan Blinkov ◽  
Hristina Poposka
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Land Cover ◽  
Land Degradation ◽  
Natural Capital ◽  
Data Sets ◽  
Land Productivity ◽  
Status And Trends ◽  
Global Data Sets ◽  
Global Data

Land degradation neutrality (LDN) is defined as a "state whereby the amount and quality of land resources nec-essary to support ecosystem functions and services and enhance food security remain stable or increase within specified temporal and spatial scales and ecosystems". The baseline is expressed as the initial (t0) estimated value of each of the three indicators, used as proxies of land-based natural capital and the ecosystem services that flow from that land base: land cover/land use change, land productivity status and trends, soil organic carbon status and trends. The baseline of LDN was calculated with estimation of the average values across the 10 years baseline period of the following indica-tors: Land Cover/Land Cover change (LC/LCC), Land Productivity Dynamics (LPD) and Soil Organic Carbon (SOC). Three tier approaches for computation of the selected indicators were used: Tier 1: Global/regional Earth observation, geospatial information and modelling; Tier 2: National statistics (only for LC/LCC) and Tier 3: Field survey. Most sig-nificant changes in LC for the period 2000/2012 are in the categories of Forest land and Shrubs/grasslands. According the global data sets used for analysis of LPD, the total affected area with depletion of Land productivity for the period 2000/2010 is identified on a only 2.35 % of the country territory. The available global data sets gives a model SOC lev-els for the period 2000/2010. According these data, the total loss of SOC in our country is estimated on 3951 t.

Evolution of geodynamics since the Archean: Significant change at the dawn of the Phanerozoic

Geology ◽  
2020 ◽  
Vol 48 (5) ◽  
pp. 488-492 ◽  
Author(s):  
M. Brown ◽  
C.L. Kirkland ◽  
T.E. Johnson
Keyword(s):  
Ultrahigh Pressure ◽  
Secular Change ◽  
Metamorphic Rocks ◽  
Data Sets ◽  
Ultrahigh Pressure Metamorphism ◽  
Slab Breakoff ◽  
Wide Range ◽  
O Isotope ◽  
Global Data Sets ◽  
Global Data

Abstract A time-series analysis of thermobaric ratios (temperature/pressure [T/P]) for Paleoarchean to Cenozoic metamorphic rocks identified significant shifts in mean T/P that may be related to secular change in the geodynamics on Earth. Thermobaric ratios showed significant (>95% confidence) change points at 1910, 902, 540, and 515 Ma, recording drops in mean T/P, and at 1830, 604, and 525 Ma, recording rises in mean T/P. Highest mean T/P occurred during the Mesoproterozoic, and lowest mean T/P occurred from the Cambrian to the Oligocene. Correlated changes were seen between T/P and global data sets of time-constrained hafnium (Hf) and oxygen (O) isotope compositions in zircon. The range of correlated variation in T/P, Hf, and O was larger during the formation of Rodinia than Columbia. Large changes and a wide range for these variables continued through the Phanerozoic, during which a statistically significant 83 m.y. frequency of T/P excursions recorded the high tempo of orogenic activity associated with the separation, migration, and accretion of continental terranes during the formation of Pangea. Since the early Tonian, the decreasing mean T/P of metamorphism, widespread appearance of blueschist and ultrahigh-pressure metamorphism, and wide fluctuations in Hf and O isotope compositions document a change to the modern plate-tectonic regime, characterized by widespread continental subduction and deeper slab breakoff than in the Proterozoic.

scholarly journals Mainstreaming Microbes across Biomes

BioScience ◽  
2020 ◽  
Vol 70 (7) ◽  
pp. 589-596 ◽  
Author(s):  
Laurence J Clarke ◽  
Penelope J Jones ◽  
Hans Ammitzboll ◽  
Leon A Barmuta ◽  
Martin F Breed ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Microbial Communities ◽  
Public Awareness ◽  
Data Sets ◽  
The Public ◽  
Microbiome Research ◽  
Potential Applications ◽  
Potential Benefits ◽  
Global Data Sets ◽  
Global Data

Abstract Bacteria, fungi, and other microorganisms in the environment (i.e., environmental microbiomes) provide vital ecosystem services and affect human health. Despite their importance, public awareness of environmental microbiomes has lagged behind that of human microbiomes. A key problem has been a scarcity of research demonstrating the microbial connections across environmental biomes (e.g., marine, soil) and between environmental and human microbiomes. We show in the present article, through analyses of almost 10,000 microbiome papers and three global data sets, that there are significant taxonomic similarities in microbial communities across biomes, but very little cross-biome research exists. This disconnect may be hindering advances in microbiome knowledge and translation. In this article, we highlight current and potential applications of environmental microbiome research and the benefits of an interdisciplinary, cross-biome approach. Microbiome scientists need to engage with each other, government, industry, and the public to ensure that research and applications proceed ethically, maximizing the potential benefits to society.

Hydrologic Downscaling of Soil Moisture Using Global Data Sets without Site-Specific Calibration

2018 ◽  
Vol 23 (11) ◽  
pp. 04018048 ◽  
Author(s):  
Nicholas R. Grieco ◽  
Jeffrey D. Niemann ◽  
Timothy R. Green ◽  
Andrew S. Jones ◽  
Peter J. Grazaitis
Keyword(s):  
Soil Moisture ◽  
Data Sets ◽  
Site Specific ◽  
Global Data Sets ◽  
Global Data

ISLSCP Initiative II global data sets: Surface boundary conditions and atmospheric forcings for land-atmosphere studies

2006 ◽  
Vol 111 (D22) ◽  
Author(s):  
Forrest G. Hall ◽  
Eric Brown de Colstoun ◽  
George J. Collatz ◽  
David Landis ◽  
Paul Dirmeyer ◽  
...  
Keyword(s):  
Boundary Conditions ◽  
Data Sets ◽  
Surface Boundary ◽  
Surface Boundary Conditions ◽  
Atmospheric Forcings ◽  
Global Data Sets ◽  
Global Data
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