Linking Biogenic High-Temperature Ice Nucleating Particles in Arctic soils and Streams to Their Microbial Producers DOI Creative Commons
Lasse Z. Jensen,

Julie K. Simonsen,

Ada Pastor

et al.

Published: Sept. 3, 2024

Abstract. Aerosols, including biological aerosols, exert a significant influence on cloud formation, influencing the global climate through their effects radiative balance and precipitation. The Arctic region features persistent mixed-phase clouds, which are impacted by ice nucleating particles (INPs) that modulate phase transitions within affecting lifetime impacting region's climate. An increasing number of studies document soils harbour large biogenic INPs (bioINPs), but these have yet to be linked microbial producers. In addition, transfer bioINPs from into freshwater marine systems has not been quantified. This study aimed at addressing open questions analyzing soil samples Northeast Greenland determine composition along with INP concentrations size distributions. We found contained between 3·104 6·106 g-1 soil, was lower side what previously reported for permafrost soils. varied widely across locations could originated bacterial fungal sources. Mortierella, genus known produce ice-nucleating proteins, present in nearly all samples. Spearman correlations taxa pointed lichenized fungi as possible contributor INP. Additionally, based distribution, we suggest were bound or membranes some locations, while other showed variety soluble different molecular sizes. streams, onset temperatures comparable measured streams temperate regions. Interestingly, stream positive association concentrations. potential release aerosolization atmosphere—whether directly they washed, oceans where might transported—could significantly impact formation precipitation patterns polar presence highly active regions holds implications properties climate, revealing significant, complex, role play system. research contributes valuable knowledge understanding communities producers connectivity streams.

Language: Английский

Terrestrial runoff is an important source of biological ice-nucleating particles in Arctic marine systems DOI Creative Commons
Corina Wieber, Lasse Z. Jensen, Leendert Vergeynst

et al.

Atmospheric chemistry and physics, Journal Year: 2025, Volume and Issue: 25(6), P. 3327 - 3346

Published: March 19, 2025

Abstract. The accelerated warming of the Arctic manifests in sea ice loss and melting glaciers, significantly altering dynamics marine biota. This disruption ecosystems can lead to an increased emission biological ice-nucleating particles (INPs) from ocean into atmosphere. Once airborne, these INPs induce cloud droplet freezing, thereby affecting lifetime radiative properties. Despite potential atmospheric impacts INPs, their properties sources remain poorly understood. By analyzing bulk water surface microlayer two southwest Greenlandic fjords, collected between June September 2018, investigating along with microbial communities, we could demonstrate a clear seasonal variation number notable input terrestrial runoff. We found highest INP concentration during late stage phytoplankton bloom active processes causing enhanced These highly were smaller size less heat-sensitive than those later summer previously identified systems. A negative correlation salinity abundance suggests freshwater as source INPs. Stable oxygen isotope analysis, strong presence bacteria such Aquaspirillum arcticum, Rhodoferax, Glaciimonas, highlighted meteoric primary origin influx, suggesting that notably originate glacial soil

Language: Английский

Citations

0
Linking Biogenic High-Temperature Ice Nucleating Particles in Arctic soils and Streams to Their Microbial Producers DOI Creative Commons
Lasse Z. Jensen,

Julie K. Simonsen,

Ada Pastor

et al.

Published: Sept. 3, 2024

Abstract. Aerosols, including biological aerosols, exert a significant influence on cloud formation, influencing the global climate through their effects radiative balance and precipitation. The Arctic region features persistent mixed-phase clouds, which are impacted by ice nucleating particles (INPs) that modulate phase transitions within affecting lifetime impacting region's climate. An increasing number of studies document soils harbour large biogenic INPs (bioINPs), but these have yet to be linked microbial producers. In addition, transfer bioINPs from into freshwater marine systems has not been quantified. This study aimed at addressing open questions analyzing soil samples Northeast Greenland determine composition along with INP concentrations size distributions. We found contained between 3·104 6·106 g-1 soil, was lower side what previously reported for permafrost soils. varied widely across locations could originated bacterial fungal sources. Mortierella, genus known produce ice-nucleating proteins, present in nearly all samples. Spearman correlations taxa pointed lichenized fungi as possible contributor INP. Additionally, based distribution, we suggest were bound or membranes some locations, while other showed variety soluble different molecular sizes. streams, onset temperatures comparable measured streams temperate regions. Interestingly, stream positive association concentrations. potential release aerosolization atmosphere—whether directly they washed, oceans where might transported—could significantly impact formation precipitation patterns polar presence highly active regions holds implications properties climate, revealing significant, complex, role play system. research contributes valuable knowledge understanding communities producers connectivity streams.

Language: Английский

Citations

0