Search Results - "Back, Jaana"

Long-term measurements of volatile organic compounds highlight the importance of sesquiterpenes for the atmospheric chemistry of a boreal forest by Hellén, Heidi, Praplan, Arnaud P, Tykkä, Toni, Ylivinkka, Ilona, Vakkari, Ville, Bäck, Jaana, Petäjä, Tuukka, Kulmala, Markku, Hakola, Hannele

“…The concentrations of terpenoids (isoprene; monoterpenes, MTs; and sesquiterpenes, SQTs) and oxygenated volatile organic compounds (OVOCs; i.e. aldehydes,…”
Get full text

Boreal forest soil is a significant and diverse source of volatile organic compounds by Mäki, Mari, Aaltonen, Hermanni, Heinonsalo, Jussi, Hellén, Heidi, Pumpanen, Jukka, Bäck, Jaana

“…Aims Vegetation emissions of volatile organic compounds (VOCs) are intensively studied world-wide, because oxidation products of VOCs contribute to atmospheric…”
Get full text

Pinus sylvestris as a missing source of nitrous oxide and methane in boreal forest by Machacova, Katerina, Bäck, Jaana, Vanhatalo, Anni, Halmeenmäki, Elisa, Kolari, Pasi, Mammarella, Ivan, Pumpanen, Jukka, Acosta, Manuel, Urban, Otmar, Pihlatie, Mari

“…Boreal forests comprise 73% of the world’s coniferous forests. Based on forest floor measurements, they have been considered a significant natural sink of…”
Get full text

Interannual and Seasonal Dynamics of Volatile Organic Compound Fluxes From the Boreal Forest Floor by Mäki, Mari, Aalto, Juho, Hellén, Heidi, Pihlatie, Mari, Bäck, Jaana

“…In the northern hemisphere, boreal forests are a major source of biogenic volatile organic compounds (BVOCs), which drive atmospheric processes and lead to…”
Get full text

Contribution of understorey vegetation and soil processes to boreal forest isoprenoid exchange by Mäki, Mari, Heinonsalo, Jussi, Hellén, Heidi, Bäck, Jaana

“…Boreal forest floor emits biogenic volatile organic compounds (BVOCs) from the understorey vegetation and the heterogeneous soil matrix, where the interactions…”
Get full text

Characterization of free amino acids, bacteria and fungi in size-segregated atmospheric aerosols in boreal forest: seasonal patterns, abundances and size distributions by Helin, Aku, Sietiö, Outi-Maaria, Heinonsalo, Jussi, Bäck, Jaana, Riekkola, Marja-Liisa, Parshintsev, Jevgeni

“…Primary biological aerosol particles (PBAPs) are ubiquitous in the atmosphere and constitute ∼ 30 % of atmospheric aerosol particle mass in sizes  > 1 µm. PBAP…”
Get full text

Emissions of biogenic volatile organic compounds from adjacent boreal fen and bog as impacted by vegetation composition by Männistö, Elisa, Ylänne, Henni, Losoi, Mari, Keinänen, Markku, Yli-Pirilä, Pasi, Korrensalo, Aino, Bäck, Jaana, Hellén, Heidi, Virtanen, Annele, Tuittila, Eeva-Stiina

“…Peatland ecosystems emit biogenic volatile organic compounds (BVOC), which have a net cooling impact on the climate. However, the quality and quantity of BVOC…”
Get full text

Estimating intra-seasonal photosynthetic discrimination and water use efficiency using δ13C of leaf sucrose in Scots pine by Tang, Yu, Schiestl-Aalto, Paulina, Lehmann, Marco M, Saurer, Matthias, Sahlstedt, Elina, Kolari, Pasi, Leppä, Kersti, Bäck, Jaana, Rinne-Garmston, Katja T

“…Abstract Sucrose has a unique role in recording environmental and physiological signals during photosynthesis in its carbon isotope composition (δ13C) and…”
Get full text

Overlooked organic vapor emissions from thawing Arctic permafrost by Li, Haiyan, Väliranta, Minna, Mäki, Mari, Kohl, Lukas, Sannel, A Britta K, Pumpanen, Jukka, Koskinen, Markku, Bäck, Jaana, Bianchi, Federico

“…Volatile organic compounds (VOCs) play an essential role in climate change and air pollution by modulating tropospheric oxidation capacity and providing…”
Get full text

Analysis of the NSC Storage Dynamics in Tree Organs Reveals the Allocation to Belowground Symbionts in the Framework of Whole Tree Carbon Balance by Schiestl-Aalto, Pauliina, Ryhti, Kira, Mäkelä, Annikki, Peltoniemi, Mikko, Bäck, Jaana, Kulmala, Liisa

“…Photosynthesis is not entirely synchronized with carbon sinks, implying that trees are capable of storing non-structural carbohydrates (NSC), such as soluble…”
Get full text

Aerosols, Clusters, Greenhouse Gases, Trace Gases and Boundary-Layer Dynamics: on Feedbacks and Interactions by Kulmala, Markku, Kokkonen, Tom, Ezhova, Ekaterina, Baklanov, Alexander, Mahura, Alexander, Mammarella, Ivan, Bäck, Jaana, Lappalainen, Hanna K., Tyuryakov, Svyatoslav, Kerminen, Veli-Matti, Zilitinkevich, Sergej, Petäjä, Tuukka

“…Turbulence is the key process transporting material and energy in the atmosphere. Furthermore, turbulence causes concentration fluctuations, influencing…”
Get full text

Long-term analysis of clear-sky new particle formation events and nonevents in Hyytiälä by Dada, Lubna, Paasonen, Pauli, Nieminen, Tuomo, Buenrostro Mazon, Stephany, Kontkanen, Jenni, Peräkylä, Otso, Lehtipalo, Katrianne, Hussein, Tareq, Petäjä, Tuukka, Kerminen, Veli-Matti, Bäck, Jaana, Kulmala, Markku

“…New particle formation (NPF) events have been observed all around the world and are known to be a major source of atmospheric aerosol particles. Here we…”
Get full text

Tree organ growth and carbon allocation dynamics impact the magnitude and δ13C signal of stem and soil CO2 fluxes by Tang, Yu, Schiestl-Aalto, Pauliina, Saurer, Matthias, Sahlstedt, Elina, Kulmala, Liisa, Kolari, Pasi, Ryhti, Kira, Salmon, Yann, Jyske, Tuula, Ding, Yiyang, Bäck, Jaana, Rinne-Garmston, Katja T

“…Abstract Incomplete knowledge of carbon (C) allocation dynamics in trees hinders accurate modeling and future predictions of tree growth. We studied C…”
Get full text

Multivariate model-based investigation of the temperature dependence of ozone concentration in Finnish boreal forest by Isokääntä, Sini, Mikkonen, Santtu, Laurikainen, Maria, Buchholz, Angela, Schobesberger, Siegfried, Blande, James D., Nieminen, Tuomo, Ylivinkka, Ilona, Bäck, Jaana, Petäjä, Tuukka, Kulmala, Markku, Yli-Juuti, Taina

“…Tropospheric ozone (O3) concentrations are observed to increase with temperature in urban and rural locations. We investigated the apparent temperature…”
Get full text

Partitioning of forest floor CO2 emissions reveals the belowground interactions between different plant groups in a Scots pine stand in southern Finland by Ryhti, Kira, Kulmala, Liisa, Pumpanen, Jukka, Isotalo, Jarkko, Pihlatie, Mari, Helmisaari, Heljä-Sisko, Leppälammi-Kujansuu, Jaana, Kieloaho, Antti-Jussi, Bäck, Jaana, Heinonsalo, Jussi

“…•The forest floor CO2 emissions were partitioned into five different sources•The size of the ‛Gadgil effect’ was estimated from forest floor CO2 emissions•The…”
Get full text

Do all chlorophyll fluorescence emission wavelengths capture the spring recovery of photosynthesis in boreal evergreen foliage? by Zhang, Chao, Atherton, Jon, Peñuelas, Josep, Filella, Iolanda, Kolari, Pasi, Aalto, Juho, Ruhanen, Hanna, Bäck, Jaana, Porcar‐Castell, Albert

“…Chlorophyll a fluorescence (ChlF) is closely related to photosynthesis and can be measured remotely using multiple spectral features as solar‐induced…”
Get full text

Resin acid δ13C and δ18O as indicators of intra‐seasonal physiological and environmental variability by Tang, Yu, Sahlstedt, Elina, Rissanen, Kaisa, Bäck, Jaana, Schiestl‐Aalto, Pauliina, Angove, Charlotte, Richter, Andreas, Saurer, Matthias, Aalto, Juho, Dukat, Paulina, Lintunen, Anna, Rinne‐Garmston, Katja T.

“…Understanding the dynamics of δ13C and δ18O in modern resin is crucial for interpreting (sub)fossilized resin records and resin production dynamics. We…”
Get full text

Modelling the regional potential for reaching carbon neutrality in Finland: Sustainable forestry, energy use and biodiversity protection by Forsius, Martin, Holmberg, Maria, Junttila, Virpi, Kujala, Heini, Schulz, Torsti, Paunu, Ville-Veikko, Savolahti, Mikko, Minunno, Francesco, Akujärvi, Anu, Bäck, Jaana, Grönroos, Juha, Heikkinen, Risto K., Karvosenoja, Niko, Mäkelä, Annikki, Mikkonen, Ninni, Pekkonen, Minna, Rankinen, Katri, Virkkala, Raimo

“…The EU aims at reaching carbon neutrality by 2050 and Finland by 2035. We integrated results of three spatially distributed model systems (FRES, PREBAS,…”
Get full text

Enhanced Volatile Organic Compounds emissions and organic aerosol mass increase the oligomer content of atmospheric aerosols by Kourtchev, Ivan, Giorio, Chiara, Manninen, Antti, Wilson, Eoin, Mahon, Brendan, Aalto, Juho, Kajos, Maija, Venables, Dean, Ruuskanen, Taina, Levula, Janne, Loponen, Matti, Connors, Sarah, Harris, Neil, Zhao, Defeng, Kiendler-Scharr, Astrid, Mentel, Thomas, Rudich, Yinon, Hallquist, Mattias, Doussin, Jean-Francois, Maenhaut, Willy, Bäck, Jaana, Petäjä, Tuukka, Wenger, John, Kulmala, Markku, Kalberer, Markus

“…Secondary organic aerosol (SOA) accounts for a dominant fraction of the submicron atmospheric particle mass, but knowledge of the formation, composition and…”
Get full text

Sesquiterpenes and oxygenated sesquiterpenes dominate the VOC (C 5 –C 20 ) emissions of downy birches by Hellén, Heidi, Praplan, Arnaud P, Tykkä, Toni, Helin, Aku, Schallhart, Simon, Schiestl-Aalto, Piia P, Bäck, Jaana, Hakola, Hannele

“…Biogenic volatile organic compounds (BVOCs) emitted by the forests are known to have strong impacts in the atmosphere. However, lots of missing reactivity is…”
Get full text