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#anthropogenic

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Public
Victor

Influence of long-term anthropogenic nitrogen input and its legacy on riverine output. #water #pollution #nitrogen #anthropogenic #river nature.com/articles/s41598-025

NatureInfluence of long-term anthropogenic nitrogen input and its legacy on riverine output - Scientific ReportsThe accelerated accumulation of anthropogenic nitrogen input and nitrogen legacies (NL) is a primary driver for persistently high nitrogen loads in rivers. Understanding the impact of nitrogen inputs and NL on river nitrogen export (RNE) is critical for improving water quality. This study employs the net anthropogenic nitrogen input (NANI) approach and export coefficient model (ECM), coupled with remote sensing data, to analyze nitrogen input dynamics, total nitrogen export (TNE), and NL from 1949 to 2021 in China’s Dongjiang River watershed. Results indicate that NANI peaked in 2017 while TNE and NL continued to grow. Over the 73 years, NANI grew rapidly from 1949 to 1992, exhibited fluctuating growth from 1993 to 2021, and reached its maximum value (6743 kg·km−2·y−1) in 2017. Meanwhile, Total nitrogen output and NL maintained a continuous growth trend, with NL contributing approximately 46.5% to RNE from 1986 to 2021. Despite reduced NANI, recent nitrogen inputs remain a major factor influencing TNE. Spatial analysis reveals that nitrogen management should prioritize agricultural practices in upstream and urban pollution control in downstream.
Public
Victor

Influence of long-term anthropogenic nitrogen input and its legacy on riverine output. #water #pollution #nitrogen #anthropogenic #river nature.com/articles/s41598-025

NatureInfluence of long-term anthropogenic nitrogen input and its legacy on riverine output - Scientific ReportsThe accelerated accumulation of anthropogenic nitrogen input and nitrogen legacies (NL) is a primary driver for persistently high nitrogen loads in rivers. Understanding the impact of nitrogen inputs and NL on river nitrogen export (RNE) is critical for improving water quality. This study employs the net anthropogenic nitrogen input (NANI) approach and export coefficient model (ECM), coupled with remote sensing data, to analyze nitrogen input dynamics, total nitrogen export (TNE), and NL from 1949 to 2021 in China’s Dongjiang River watershed. Results indicate that NANI peaked in 2017 while TNE and NL continued to grow. Over the 73 years, NANI grew rapidly from 1949 to 1992, exhibited fluctuating growth from 1993 to 2021, and reached its maximum value (6743 kg·km−2·y−1) in 2017. Meanwhile, Total nitrogen output and NL maintained a continuous growth trend, with NL contributing approximately 46.5% to RNE from 1986 to 2021. Despite reduced NANI, recent nitrogen inputs remain a major factor influencing TNE. Spatial analysis reveals that nitrogen management should prioritize agricultural practices in upstream and urban pollution control in downstream.
Public
Christophe Bousquet

#Sad but #true

#Survival of Eurasian #lynx in the human-dominated landscape of #Europe

#OpenAccess
#ConservationBiology

#IllegalKilling was the main cause of #mortality (33.8%), and mortality rates were similar in protected and hunted populations (8.6% and 7.0% per year, respectively). Due to the low natural mortality rates in protected and hunted populations, #anthropogenic causes of mortality are likely close to additive, such that maintaining or increasing refuge #habitat with little human #disturbance is critical to lynx #conservation.

conbio.onlinelibrary.wiley.com

Public
💧🌏 Greg Cocks

Identification Of Geothermal Anomalies From Landsat Derived Land Surface Temperature, Mount Meager Volcanic Complex, British Columbia, Canada
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doi.org/10.1016/j.rse.2025.114 <-- shared paper
--
“Highlights:
• A novel method for detecting geothermal components from solar energy dominated LST.
• Using LST time series to eliminate temporal variant solar energy input.
• Uncertainty in anomaly identification quantified by probability measure.
• Capable of revealing LST anomalies caused by geothermal, anthropogenic and surface processes..."
#GIS #spatial #mapping #britishcolumbia #BC #solar #geothermal #remotesensing #earthobservation #LST #spatialanalysis #spatiotemporal #naturalresources #volcanic #geology #geostatistics #landsurfacetemperature #satellite #geothermalheatflux #GHF #energybalance #calculation #model #MountMeager #Landsat #landsat8 #hotspring #landslide #massmovement #engineeringgeology #spring #seep #anthropogenic #HEP #hydropower #monitoring #risk #hazard

photo - sampling a fumerole, Job Glacier, Mount Meager, British Columbia, Canada
Inverted resistivity model from AMT data showing the subsurface rock resistivity structure in South Mount Meager (figure modified from Hormozzade Ghalati et al., 2022). a) resistivity slice at 500 m elevation (asl) showing two distinct high conductive anomalies and locations of the cross sections. Cross sections b) and c) in W-E direction, and d) and e) in N-S direction. Anomaly C1 is spatially in accordance with the occurrence of hot-warm spring swarms along the margin of the volcanic complex. Anomaly C2 appears in a circular shape, coincident spatially with the core area of the known deep geothermal prospect.
a) Map showing the location of Mount Meager Volcanic Complex (MMVC) and its relationship with the Garibaldi Volcanic Belt in western Canada (modified from Stewart, 2002). BR (Bridge River), CC (Mt. Cayley), EV (Elaho Valley), MG (Mt. Garibaldi), MC (Mountain Creek), WP (Watts Point). The red rectangular marks the study area. b, a Landsat-8 colour image (2017-07-18) showing details of the study area by a summer view of the MMVC with glacier (blue) at high altitude and vegetation cover (green) along the river valley. The red circle indicates locations of geothermal exploration wells, and orange polygons, the known hot springs.
Enlarged GHF anomaly maps and Google images explaining some of the possible anthropogenic and natural causes of high LST anomalies: a) GHF component of East Meager Anomaly; b) Google Earth image showing hydro-power station related facilities, and open quarries for local construction and road maintenance; c) GHF component of North Meager; d) Google Earth image showing a possible landslide site coincident with the anomalies.
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💧🌏 Greg Cocks

Glacier Melt Intensifying Freshwater Loss And Accelerating Sea-Level Rise
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esa.int/Applications/Observing <-- shared technical article
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doi.org/10.1038/s41586-024-085 <-- shared paper
--
#GIS #spatial #mapping #GlacierMassBalanceIntercomparison #glacial #glacier #global #cryosphere #regional #freshwater #water #resources #waterresources #watersecurity #sealevel #sealevelrise #SLR #rate #change #spatialanalysis #spatiotemporal #ice #snow #loss #massloss #greenland #antarctic #icesheet #anthropogenic #climatechange #melt #melting #risk #hazard #geohazard #geology #engineeringgeology #marine #terrestrial #ecosystems #watercycle #masschange #insitu #remotesensing #local #observation #model #modeling #projection

map and charts - Global glacier mass changes from 2000 to 2023
charts - Annual and cumulative glacier mass change from 2000 to 2023
satellite image - Chugach Mountains, Alaska - Glaciers in the Chugach Mountains of Alaska. This image, captured by the Copernicus Sentinel-2 mission on 6 October 2017, shows the melting Scott (left), Sheridan (middle) and Childs (right) glaciers feeding lakes and rivers in their forefields.
photo - Golubin Glacier, Kyrgyzstan, 2012
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BellingenNSW

Levels of microplastics in human brains may be rapidly rising, study suggests

"The exponential rise in microplastic pollution over the past 50 years may be reflected in increasing contamination in human brains, according to a new study."

"The human body is widely contaminated by microplastics. They have also been found in blood, semen, breast milk, placentas and bone marrow. The impact on human health is largely unknown, but they have been linked to strokes and heart attacks".
>>
theguardian.com/environment/20
#plastics #anthropogenic #microplastics #nanoplastic #contamination #MNP #polyethylene #PolymerBasedParticulates #body #OneHealth #pollution

Plastic 'library' at Sawtell beach. Blowing in the wind at the end of the day
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rexi

pdx.edu/research/news/micropla

“We found that the smaller organisms that we sampled seem to be ingesting more #anthropogenic, non-nutritious particles,” Granek said. “Shrimp and small fish, like herring, are eating smaller food items like #zooplankton…and these anthropogenic particles may resemble zooplankton and thus be taken up for animals that feed on zooplankton.”

The team quantified anthropogenic particles that they found in the edible tissue of six species that are economically or culturally important in Oregon (clockwise from top left): Chinook salmon, lingcod, black rockfish, pink shrimp, Pacific herring, and Pacific lamprey (NOAA Fisheries, Oregon Department of Fish & Wildlife, North Carolina Wildlife Resource Commission).
#microplastics
Public
DoomsdaysCW

Human use of fire has produced an era of uncontrolled burning: Welcome to the #Pyrocene

by Stephen Pyne, The Conversation, January 22, 2025

"#LosAngeles is burning, but it isn't alone. In recent years, fires have blasted through cities in #Colorado, the southern #Appalachians and the island of #Maui, along with #Canada, #Australia, #Portugal and #Greece. What wasn't burned was smoked in.

"Is this another case of a future not only dire but strange, without a narrative to join past to present or an analog for what is to come?

"I'm a historian of fire, and my reply is that we have both a narrative and an analog. The narrative is the unbroken saga of humanity and fire, a companionship that extends through all our existence as a species. The analog is that humanity's fire practices have become so vast, especially in recent centuries, that we are creating the fire equivalent of an ice age."

[...]

Welcome to the Pyrocene

"Widen the aperture a bit, and we can envision Earth entering a fire age comparable to the ice ages of the Pleistocene, complete with the pyric equivalent of ice sheets, pluvial lakes, periglacial outwash plains, mass extinctions and sea-level changes. It's an epoch in which fire is both prime mover and principal expression.

"Humanity's firepower underpins the #Anthropocene, which is the outcome not just of #anthropogenic meddling but of a particular kind of meddling, made possible by humans' species monopoly over fire. Even climate history has become a subset of fire history.

"Fires in living landscapes, fires burning lithic landscapes—the interaction of these two realms of fire has not been much studied. It's been enough of a stretch to fully include human fire practices within traditional ecology. Yet humans—the keystone species for fire on Earth—are merging the two arenas of earthly burning with a give and take that is reshaping the planet in what resembles a slow-motion #Ragnarok.

"Add up all the effects, direct and indirect: the ice driven off by fire, the areas burning, the biogeographical #migrations as biotas move to accommodate changed conditions, the collateral impacts with damaged #watersheds and #airsheds, the unraveling of #ecosystems, the pervasive power of #ClimateChange, #RisingSeaLevels, a #MassExtinction, the disruption of human life and habitats. The result is a #pyrogeography that looks eerily like an ice age for fire. You have a maturing Pyrocene.

"If you doubt it, just ask California."

Full article (it's a good read):
phys.org/news/2025-01-human-er
#Wildfires #UncontrolledFires #HistoryOfFire #PyroceneEra #ControlledBurning #ClimateCrisis

Phys.org · Human use of fire has produced an era of uncontrolled burning: Welcome to the PyroceneBy Stephen Pyne
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