A5030695064- Ionosphere and magnetosphere dynamics
- Atmospheric Ozone and Climate
- Astro and Planetary Science
- Forest Ecology and Biodiversity Studies
- Solar and Space Plasma Dynamics
- Earthquake Detection and Analysis
- Forest Insect Ecology and Management
- Lichen and fungal ecology
- Planetary Science and Exploration
- Geomagnetism and Paleomagnetism Studies
- Botany and Plant Ecology Studies
- Atmospheric chemistry and aerosols
- Forest Management and Policy
- Geophysics and Gravity Measurements
- Ecology and Vegetation Dynamics Studies
- Geophysical and Geoelectrical Methods
- Atmospheric and Environmental Gas Dynamics
- Atmospheric aerosols and clouds
- Mycorrhizal Fungi and Plant Interactions
- Rocket and propulsion systems research
- Spacecraft and Cryogenic Technologies
- Air Quality and Health Impacts
- Aerospace Engineering and Energy Systems
- Spacecraft Design and Technology
- Plasma Diagnostics and Applications
Stockholm University
2015-2025
County Administrative Board
2013-2020
SRI International
2018
Menlo School
2018
Landstinget i Kalmar län
2013
Lund University
2001-2007
Luleå University of Technology
2003
We review species richness in major organism groups, mainly using examples from northern Europe. A high proportion of these is forest living, and large numbers are dependent on decaying wood. Biodiversity can be assessed at various scales two different principles. One to use features, such as ancient dead trees, known important for a number species. The other method choose or groups indicate biodiversity presence many red-listed argue that any serious assessment should include the most rich...
We present results of in situ measurements charged nanoparticles, electrons, and positive ions obtained during a sounding rocket flight October 2004 from Kiruna, Sweden, under nighttime conditions. The particle measurement reveals charge signatures the altitude range between 80 90 km corresponding to peak number densities ∼100 e /cm 3 at around 86 km. Aerodynamical analysis sampling efficiency our instrument that particles must have been larger than 2 nm assuming spherical with density g/cm...
Abstract. We present in situ observations of meteoric smoke particles (MSP) obtained during three sounding rocket flights December 2010 the frame final campaign Norwegian-German ECOMA project (ECOMA = Existence and Charge state Of Middle Atmosphere). The were conducted before, at maximum activity, after decline Geminids which is one major meteor showers over year. Measurements with particle detector yield both profiles naturally charged (Faraday cup measurement) as well photoelectrons...
Abstract The Small Payloads for Investigation of Disturbances in Electrojet by Rockets 2 (SPIDER‐2) sounding rocket was launched from Esrange, Sweden, on the 19th February 2020 at 23:14 UT. It traversed a pulsating aurora event, deploying eight free falling units which provided situ multi‐point measurements electric field, magnetic field and plasma parameters. In this article, measured parameters have been analyzed compared with each other optical obtained ground based instrumentation. Peaks...
Abstract. MATS (Mesospheric Airglow/Aerosol Tomography and Spectroscopy) is a Swedish satellite mission designed to investigate atmospheric gravity waves. In order observe wave patterns observes structures in the O2 band airglow (light emitted by oxygen molecules Mesosphere Lower Thermosphere), as well noctilucent clouds which form around Mesopause. The main instrument telescope that continuously captures high-resolution images of limb. Using tomographic analysis acquired images, can...
Abstract. Global three-dimensional data are a key to understanding gravity waves in the mesosphere and lower thermosphere. MATS (Mesospheric Airglow/Aerosol Tomography Spectroscopy) is new Swedish satellite mission that addresses this need. It applies space-borne limb imaging combination with tomographic spectroscopic analysis obtain wave on relevant spatial scales. Primary measurement targets O2 atmospheric band dayglow nightglow near infrared, sunlight scattered from noctilucent clouds...
Abstract Biodiversity management in broadleaved forests includes partial cutting to improve conditions for species that benefit from semi-open stand structure. The harvested wood is usually used as fuel and, therefore, it stockpiled situ months before further processing. If such forest piles attract saproxylic insects, they are likely be ecological traps, because the settling cost insects death chipped and energy. This study investigated beetle composition of oak southern Sweden. Species...
Abstract. Meteoric smoke particles have been proposed as a key player in the formation and evolution of mesospheric phenomena. Despite their apparent importance still very little is known about these particles. Important questions concern number density size distribution function altitude well fraction charged Sounding rockets are used to measure situ, but aerodynamics has remained major challenge. Basically, small tend follow gas flow around payload rather than reaching detector if not...
A first sounding rocket campaign dedicated to investigate the creation mechanism of Polar Mesosphere Winter Echoes (PMWE) was conducted in April 2018 from north Norwegian Andøya Space Center (69 °N, 16 °E). Two instrumented rockets were launched on 13th and 18th under PMWE non-PMWE conditions, respectively. In this paper we give an overview mission. We describe discuss some results combined situ ground-based measurements which allow verify existing theories. Our ultimately show that: a)...
Abstract. Accurate knowledge about the distribution of atomic oxygen is crucial for many studies mesosphere and lower thermosphere. Direct measurements by resonance fluorescence technique at 130 nm have been made from sounding rocket payloads in past. This measurement yields profiles with good sensitivity altitude resolution. However, accuracy a problem as calibration aerodynamics make quantitative analysis challenging. Most often, accuracies better than factor 2 are not to be expected...
Abstract Metal species, produced by meteoric ablation, act as useful tracers of upper atmosphere dynamics and chemistry. Of these metals, K is an enigma: at extratropical latitudes, limited available lidar data show that the layer displays a semiannual seasonal variability, rather than annual pattern seen in other metals such Na Fe. Here we present first near‐global retrieval, where atom number density profiles are derived from dayglow measurements made Optical Spectrograph Infrared Imager...
Old trees are rare in the landscape, as many of their associated species. Veteranisation is a method by which attempts made to create microhabitats, otherwise found only old trees, younger at an earlier stage than would occur naturally. Here, we analysed early fungal succession 6 y-old veteranisation wounds ca. 100 y living oak trunks DNA-barcoding wood eight sites Sweden and Norway. We hypothesised basidiomycetes be most abundant, exposed sapwood heartwood select for different communities....
Abstract We discuss die human impact on the forests of northwestern Europe, especially changes in disturbance regimes and density important features for biodiversity preservation. In southern Sweden, impacts have decreased densities old (>150 years) living trees large (DBH > 40 cm) dead to less than 1% their original densities. same fashion, forest fires enormously extent during last 300 years, except southwestern Sweden where fire frequency was presumably lower. These had a tremendous...
Abstract. In summer 2013 the WADIS-1 sounding rocket campaign was conducted at Andøya Space Center (ACS) in northern Norway (69° N, 16° E). Among other things, it addressed question of variability mesosphere/lower thermosphere (MLT) turbulence, both time and space. A unique feature WADIS project multi-point turbulence applying different measurement techniques including rocket-borne ionization gauges, VHF MAARSY radar, EISCAT radar near Tromsø. This allowed for horizontal to be observed field...