Search Results

• • 47 

    Academic Journals

  • Sort by: sorttype.publication.date.desc Newest sorttype.publication.date.asc Oldest sorttype.relevance Relevance

• Technical note: Incorporating expert domain knowledge into causal structure discovery workflows.

  Authors:Jarmo Mäkelä, Laila Melkas, Ivan Mammarella, Tuomo Nieminen, Suyog Chandramouli, Rafael Savvides, et al.From:Biogeosciences (Vol. 19, Issue 8) Peer-Reviewed

  Apr. 19, 2022180 words Brief article In this note, we argue that the outputs of causal discovery algorithms should not usually be considered end results but rather starting points and hypotheses for further study. The incentive to explore this topic came...

• Overview: Recent advances in the understanding of the northern Eurasian environments and of the urban air quality in China - a Pan-Eurasian Experiment (PEEX) programme perspective.

  Authors:Hanna K. Lappalainen, Tuukka Petäjä, Timo Vihma, Jouni Räisänen, Alexander Baklanov, Sergey Chalov, et al.From:Atmospheric Chemistry and Physics (Vol. 22, Issue 7) Peer-Reviewed

  Apr. 6, 2022358 words Brief article The Pan-Eurasian Experiment (PEEX) Science Plan, released in 2015, addressed a need for a holistic system understanding and outlined the most urgent research needs for the rapidly changing Arctic-boreal region. Air...

• Long-term fluxes of carbonyl sulfide and their seasonality and interannual variability in a boreal forest.

  Authors:Timo Vesala, Kukka-Maaria Kohonen, Linda M. J. Kooijmans, Arnaud P. Praplan, Lenka Foltýnová, Pasi Kolari, et al.From:Atmospheric Chemistry and Physics (Vol. 22, Issue 4) Peer-Reviewed

  Feb. 25, 2022359 words Brief article The seasonality and interannual variability of terrestrial carbonyl sulfide (COS) fluxes are poorly constrained. We present the first easy-to-use parameterization for the net COS forest sink based on the longest existing...

• The ABCflux database: Arctic-boreal CO.sub.2 flux observations and ancillary information aggregated to monthly time steps across terrestrial ecosystems.

  Authors:Anna-Maria Virkkala, Susan M. Natali, Brendan M. Rogers, Jennifer D. Watts, Kathleen Savage, Sara June Connon, et al.From:Earth System Science Data (Vol. 14, Issue 1) Peer-Reviewed

  Jan. 21, 2022336 words Brief article Past efforts to synthesize and quantify the magnitude and change in carbon dioxide (CO.sub.2) fluxes in terrestrial ecosystems across the rapidly warming Arctic-boreal zone (ABZ) have provided valuable information but...

• Evaluation of carbonyl sulfide biosphere exchange in the Simple Biosphere Model (SiB4).

  Authors:Linda M. J. Kooijmans, Ara Cho, Jin Ma, Aleya Kaushik, Katherine D. Haynes, Ian Baker, et al.From:Biogeosciences (Vol. 18, Issue 24) Peer-Reviewed

  Dec. 22, 2021510 words Article The uptake of carbonyl sulfide (COS) by terrestrial plants is linked to photosynthetic uptake of CO.sub.2 as these gases partly share the same uptake pathway. Applying COS as a photosynthesis tracer in models requires an...

• Ozone deposition impact assessments for forest canopies require accurate ozone flux partitioning on diurnal timescales.

  Authors:Auke J. Visser, Laurens N. Ganzeveld, Ignacio Goded, Maarten C. Krol, Ivan Mammarella, Giovanni Manca, et al.From:Atmospheric Chemistry and Physics (Vol. 21, Issue 24) Peer-Reviewed

  Dec. 17, 2021347 words Brief article Dry deposition is an important sink of tropospheric ozone that affects surface concentrations and impacts crop yields, the land carbon sink, and the terrestrial water cycle. Dry deposition pathways include plant uptake...

• An algorithm to detect non-background signals in greenhouse gas time series from European tall tower and mountain stations.

  Authors:Alex Resovsky, Michel Ramonet, Leonard Rivier, Jerome Tarniewicz, Philippe Ciais, Martin Steinbacher, et al.From:Atmospheric Measurement Techniques (Vol. 14, Issue 9) Peer-Reviewed

  Sept. 17, 2021188 words Brief article We present a statistical framework to identify regional signals in station-based CO.sub.2 time series with minimal local influence. A curve-fitting function is first applied to the detrended time series to derive a...

• Carbon balance of a Finnish bog: temporal variability and limiting factors based on 6 years of eddy-covariance data.

  Authors:Pavel Alekseychik, Aino Korrensalo, Ivan Mammarella, Samuli Launiainen, Eeva-Stiina Tuittila, Ilkka Korpela, et al.From:Biogeosciences (Vol. 18, Issue 16) Peer-Reviewed

  Aug. 17, 2021445 words Article Pristine boreal mires are known as substantial sinks of carbon dioxide (CO.sub.2) and net emitters of methane (CH.sub.4). Bogs constitute a major fraction of pristine boreal mires. However, the bog CO.sub.2 and CH.sub.4...

• Vertical characterization of highly oxygenated molecules (HOMs) below and above a boreal forest canopy

  Authors:Qiaozhi Zha, Chao Yan, Heikki Junninen, Matthieu Riva, Nina Sarnela, Juho Aalto, et al.From:Atmospheric Chemistry and Physics (Vol. 18, Issue 23) Peer-Reviewed

  Dec. 10, 2018295 words Author abstract, Bri...

  While the role of highly oxygenated molecules (HOMs) in new particle formation (NPF) and secondary organic aerosol (SOA) formation is not in dispute, the interplay between HOM chemistry and atmospheric conditions...

• Multi-year methane ebullition measurements from water and bare peat surfaces of a patterned boreal bog

  Authors:Elisa Mannisto, Aino Korrensalo, Pavel Alekseychik, Ivan Mammarella, Olli Peltola, Timo Vesala, et al.From:Biogeosciences (Vol. 16, Issue 11) Peer-Reviewed

  June 14, 2019306 words Author abstract, Bri...

  We measured methane ebullition from a patterned boreal bog situated in the Siikaneva wetland complex in southern Finland. Measurements were conducted on water (W) and bare peat surfaces (BP) in three growing seasons...

• LAKE 2.0: a model for temperature, methane, carbon dioxide and oxygen dynamics in lakes

  Authors:Victor Stepanenko, Ivan Mammarella, Anne Ojala, Heli Miettinen, Vasily Lykosov, and Timo VesalaFrom:Geoscientific Model Development (Vol. 9, Issue 5) Peer-Reviewed

  May 30, 2016197 words Brief article A one-dimensional (1-D) model for an enclosed basin (lake) is presented, which reproduces temperature, horizontal velocities, oxygen, carbon dioxide and methane in the basin. All prognostic variables are treated in a...

• The high-frequency response correction of eddy covariance fluxes - Part 1: An experimental approach and its interdependence with the time-lag estimation.

  Authors:Olli Peltola, Toprak Aslan, Andreas Ibrom, Eiko Nemitz, Ãllar Rannik, and Ivan MammarellaFrom:Atmospheric Measurement Techniques (Vol. 14, Issue 7) Peer-Reviewed

  July 28, 2021395 words Brief article The eddy covariance (EC) technique has emerged as the prevailing method to observe the ecosystem-atmosphere exchange of gases, heat and momentum. EC measurements require rigorous data processing to derive the fluxes that...

• Monthly gridded data product of northern wetland methane emissions based on upscaling eddy covariance observations

  Authors:Olli Peltola, Timo Vesala, Yao Gao, Pavel Alekseychik, Mika Aurela, Bogdan Chojnicki, et al.From:Earth System Science Data (Vol. 11, Issue 3) Peer-Reviewed

  Aug. 22, 2019318 words Author abstract, Bri...

  Natural wetlands constitute the largest and most uncertain source of methane (CH.sub.4) to the atmosphere and a large fraction of them are found in the northern latitudes. These emissions are typically estimated...

• Small spatial variability in methane emission measured from a wet patterned boreal bog

  Authors:Aino Korrensalo, Pavel Alekseychik, Ivan Mammarella, Janne Rinne, Timo Vesala, and Eeva-Stiina TuittilaFrom:Biogeosciences (Vol. 15, Issue 6) Peer-Reviewed

  Mar. 26, 201848 words Author abstract, Bri... Byline: Aino Korrensalo, Elisa Mä,nnistö,, Pavel Alekseychik, Ivan Mammarella, Janne Rinne, Timo Vesala, Eeva-Stiina Tuittila To access, purchase, authenticate, or subscribe to the full-text of this article,...

• Soil concentrations and soil-atmosphere exchange of alkylamines in a boreal Scots pine forest

  Authors:Antti-Jussi Kieloaho, Mari Pihlatie, Samuli Launiainen, Markku Kulmala, Marja-Liisa Riekkola, Jevgeni Parshintsev, et al.From:Biogeosciences (Vol. 14, Issue 5) Peer-Reviewed

  Mar. 8, 2017276 words Brief article Alkylamines are important precursors in secondary aerosol formation in the boreal forest atmosphere. To better understand the behavior and sources of two alkylamines, dimethylamine (DMA) and...

• Synthetic ozone deposition and stomatal uptake at flux tower sites

  Authors:Jason A. Ducker, Christopher D. Holmes, Trevor F. Keenan, Silvano Fares, Allen H. Goldstein, Ivan Mammarella, et al.From:Biogeosciences (Vol. 15, Issue 17) Peer-Reviewed

  Sept. 6, 2018369 words Author abstract, Bri...

  We develop and evaluate a method to estimate O.sub.3 deposition and stomatal O.sub.3 uptake across networks of eddy covariance flux tower sites where O.sub.3 concentrations and O.sub.3 fluxes have not been measured....

• Carbon dioxide and methane fluxes from different surface types in a created urban wetland.

  Authors:Xuefei Li, Outi Wahlroos, Sami Haapanala, Jukka Pumpanen, Harri Vasander, Anne Ojala, et al.From:Biogeosciences (Vol. 17, Issue 13) Peer-Reviewed

  July 6, 2020489 words Article Many wetlands have been drained due to urbanization, agriculture, forestry or other purposes, which has resulted in a loss of their ecosystem services. To protect receiving waters and to achieve services such as flood...

• Large-eddy simulation and stochastic modeling of Lagrangian particles for footprint determination in the stable boundary layer

  Authors:Andrey Glazunov, Victor Stepanenko, Vasily Lykosov, Mikko Auvinen, Timo Vesala, and Ivan MammarellaFrom:Geoscientific Model Development (Vol. 9, Issue 9) Peer-Reviewed

  Aug. 31, 2016190 words Brief article Large-eddy simulation (LES) and Lagrangian stochastic modeling of passive particle dispersion were applied to the scalar flux footprint determination in the stable atmospheric boundary layer. The sensitivity of the LES...

• Random uncertainties of flux measurements by the eddy covariance technique

  Authors:Olli Peltola and Ivan MammarellaFrom:Atmospheric Measurement Techniques (Vol. 9, Issue 10) Peer-Reviewed

  Oct. 21, 2016309 words Brief article Large variability is inherent to turbulent flux observations. We review different methods used to estimate the flux random errors. Flux errors are calculated using measured turbulent and simulated artificial records. We...

• Carbon dioxide exchange of a perennial bioenergy crop cultivation on a mineral soil

  Authors:Saara E. Lind, Narasinha J. Shurpali, Olli Peltola, Ivan Mammarella, Marja Maljanen, and Pertti J. MartikainenFrom:Biogeosciences (Vol. 13, Issue 4) Peer-Reviewed

  Mar. 1, 2016297 words Author abstract, Bri... One of the strategies to reduce carbon dioxide (CO.sub.2) emissions from the energy sector is to increase the use of renewable energy sources such as bioenergy crops. Bioenergy is not necessarily carbon neutral because...