💧🌏 Greg CocksApr 3, 2025
NASA Earth Surface Mineral Dust Source Investigation (EMIT) Remote Sensing And Mapping
--
https://earth.jpl.nasa.gov/emit/ <-- shared NASA EMIT home page
--
https://phys.org/news/2023-12-nasa-emit-instrument-global-airborne.html <-- shared technical article
--
https://youtu.be/z9RjGdfxSDk?si=vMU9UAtAUcnvetwm <-- shared overview video
--
#GIS #spatial #mapping #fedscience #remotesensing #earthobservation #mineral #rockdust #source #investigation #calcite #chlorite #transport #dust #suspended #atmosphere #affects #effects #heating #cooling #albedo #spatialanalysis #spatiotemporal #nutrient #loess #publichealth #model #modeling #mineraldust
@nasa
Home – EMIT

EMIT will make the first detailed maps of dust composition of Earth’s dust source regions and use state-of-the-art climate models to better understand regional and global heating and cooling impacts and future changes in dust source regions.

EMIT
Séraphitüs-SéraphîtaMar 4, 2025

Recently Lab Rat featured my piece “LOESS I” in its entirety! It’s a loaded show at 2hrs 39mins, with dedication to the long form towards the end (which is of course where you’ll find my track):
http://www.mixcloud.com/IslingtonRadio/lab-rat-with-porlie-eidolon-27022025

As always - a special thanks to Porlie Eidolon at Islington Radio!

#labrat #islingtonradio #loess #radio #darkambient #noise #harshnoise #experimental #dark #music #ambient

Nina DavtianFeb 11, 2025

On this #InternationalDayOfWomenAndGirlsInScience, here is a great story presented in two papers led by a #WomanInScience (Jingjing Guo) and last authored by another #WomanInScience (Francien Peterse).

#Scientific #publication #1: https://doi.org/10.5194/cp-21-343-2025
Scientific publication #2: https://doi.org/10.1016/j.orggeochem.2025.104947

#Science
#ScienceMastodon
#AcademicMastodon
#PaleoClimate
#PaleoHydrology
#EastAsianMonsoon
#PaleoTemperature
#OrganicGeochemistry
#GDGTs #brGDGTs
#ClimateProxies #Loess
#IDWGS #IDWGS2025

Towards quantitative reconstruction of past monsoon precipitation based on tetraether membrane lipids in Chinese loess

Abstract. Variations in the oxygen isotope composition (δ18O) of cave speleothems and numerous proxy records from loess–paleosol sequences have revealed past variations in East Asian monsoon (EAM) intensity. However, challenges persist in reconstructing precipitation changes quantitatively. Here, we use the positive relationship between the degree of cyclization (DC) of branched glycerol dialkyl glycerol tetraethers (brGDGTs) in modern surface soils from the Chinese Loess Plateau (CLP) and mean annual precipitation (MAP) to quantify past monsoon precipitation changes on the CLP. We present a new ∼ 130 000-year-long DC-based MAP record for the Yuanbao section on the western edge of the CLP, which closely tracks the orbital- and millennial-scale variations in available records of both speleothem δ18O and the hydrogen isotope composition of plant waxes (δ2Hwax) from the same section. Combing our new data with existing brGDGT records from other CLP sites reveals a spatial gradient in MAP that is most pronounced during glacials, when the western CLP experiences more arid conditions and receives up to ∼ 250 mm less precipitation than in the southeast, whereas MAP is ∼ 850 mm across the CLP during the Holocene optimum. Furthermore, the DC records show that precipitation amount on the CLP varies at both the precession scale and the obliquity scale, as opposed to the primarily precession-scale variations in speleothem δ18O and δ2Hwax at Yuanbao and the 100 kyr cycle in other loess proxies, such as magnetic susceptibility, which rather indicates the relative intensity of the EAM. At the precession scale, the DC record is in phase with δ2Hwax from the same section and the speleothem δ18O record, which supports the hypothesis that monsoon precipitation is driven by Northern Hemisphere summer insolation.

Niels de WinterAug 19, 2024

Compositional changes in land #snail assemblages from #china #loess sequences over the past 20,000 years reveal the unprecedented scale of recent #anthropogenic #impacts

#climate #paleoclimate #mollusc #climatechange #landuse

https://www.sciencedirect.com/science/article/pii/S0031018224003778

Compositional changes in land snail assemblages from Chinese loess sequences over the past 20,000 years reveal the unprecedented scale of recent anthropogenic impacts

Land snails are sensitive to environmental changes and are valuable indicators of past changes. In this study, we analyzed 88,000 fossilized land snai…

Jesse OnlandSep 29, 2023

I added a small contribution to the density plot debate to the analysis of my crossword solving times: https://jdonland.github.io/posts/crossword_times/crossword_times.html

tl;dr: LOESS-based density plots like the ones produced by `geom_violin` have some problems that are ultimately the result of neglecting to specify and fit your own model.

#geom_violin #loess #bayesian #crosswords

Jesse Onland - Crossword Times

A consideration of cruciverbal complexity.

Forest GreggDec 15, 2022

R’s easy seasonality/trend decomposition, stl, is really nice and MinGyu Lee has ported it to javascript!

https://www.npmjs.com/package/stlnode

#timeseries #loess #javascript

stlnode

Node port of Seasonal Decomposition of Time Series by Loess. Latest version: 0.0.1, last published: 4 years ago. Start using stlnode in your project by running `npm i stlnode`. There is 1 other project in the npm registry using stlnode.

npm
Dr Anke MarshNov 23, 2022
#Earthworms #Loess #climate all in one article! @frankashwood @gino https://www.nature.com/articles/s43247-022-00595-3
Millennial-timescale quantitative estimates of climate dynamics in central Europe from earthworm calcite granules in loess deposits - Communications Earth & Environment

Western-central European summers were about 6–10 °C cooler with roughly 30–70% less precipitation during last glacial climate oscillations compared to modern values, according to quantitative paleoclimate estimates based on earthworm calcite granules.

Nature
Kaja FennNov 18, 2022

Hello everyone!
New here; escaping the hellscape of Twitter.

Here is a short intro. I'm Kaja a #Quaternary Scientist based at University of Liverpool.
I work on:
• developing #chronology using #luminescence dating (#OSL)
• understanding sediment #provenance using #geochemistry
• #dust records of environmental change (#loess)

I also bake, climb, hike, row, and absolutely love rocks 🪨🖤

Franco PyrihJul 12, 2022

— ¿Qué estás cursando?
— Métodos numéricos.
— Suena terrible.
— Lo-es(s)

#humor #LOESS #LOWESS #RegresiónLocal #estadística #chiste #ChisteMalo #EstáBien #ComputaciónUBA #MétodosNuméricos #TP3

Universität TübingenDec 21, 2021

RT @[email protected]

🥳New Paper Published #callforreading #mdpiquaternary
#Luminescence Sensitivity of #Rhine #Valley #Loess: Indicators of Source Variability? @[email protected] @[email protected] @[email protected] @[email protected] @[email protected]
🌟View at: https://www.mdpi.com/2571-550X/5/1/1
👉Related SI: https://www.mdpi.com/journal/quaternary/special_issues/Loess

🐦🔗: https://twitter.com/Quaternary_MDPI/status/1473231518088970242

Luminescence Sensitivity of Rhine Valley Loess: Indicators of Source Variability?

Loess provides a valuable terrestrial record of past environmental conditions, including the dynamics and trajectories of air mass circulation responsible for dust transport. Here we explore variations in the luminescence sensitivity characteristics of sedimentary quartz and feldspar as possible tools for identifying changes in source down a loess-palaeosol sequence (LPS). Luminescence sensitivity is a rapidly measurable index which is the product of interplay between source lithology and the history of the quartz or feldspar clasts. Variations in sensitivity of down profile may therefore reflect changes in sediment provenance as well as other factors such as weathering through pedogenesis. We undertake an empirical investigation of the luminescence sensitivity of quartz and feldspar from different grain-size fractions from the Schwalbenberg LPS in the German Rhine valley. We compare samples from a 30 m core spanning the last full glacial cycle with samples of oxygen isotope stage (OIS) 3&ndash;2 age exposed within nearby profile. We find an overall inverse relationship between quartz and feldspar sensitivity, as well as variability in sensitivity between different quartz grain sizes. Statistical analyses yield a significant correlation between IR50 sensitivity from unprocessed sediments and clay content, and feldspar sensitivity and Si/Al ratios down the core. Since Si/Al ratios may indicate changes in provenance, the latter correlation suggests that IR50 measurements on unprocessed samples may be used to provide a reliable, rapid scan of source variability over millennial timescales.

MDPI