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Missing Gas-Phase Source of HONO Inferred from Zeppelin Measurements in the Troposphere.

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Title: Missing Gas-Phase Source of HONO Inferred from Zeppelin Measurements in the Troposphere.
Authors: Xin Li, Rohrer, Franz, Hofzumahaus, Andreas, Brauers, Theo, Häseler, Rolf, Bohn, Birger, Broch, Sebastian, Fuchs, Hendrik, Gomm, Sebastian, Holland, Frank, Jäger, Julia, Kaiser, Jennifer, Keutsch, Frank N., Lohse, Insa, Keding Lu, Tillmann, Ralf, Wegener, Robert, Wolfe, Glenn M., Mentel, Thomas F., Kiendier-Scharr, Astrid
Source: Science (pre-March 2025). 4/18/2014, Vol. 344 Issue 6181, p292-296. 5p.
Subjects: Nitrous acid, Tropospheric chemistry, Hydroxyl group, Gas phase reactions, Troposphere
Abstract: Gaseous nitrous acid (HONO) is an important precursor of tropospheric hydroxyl radicals (OH). OH is responsible for atmospheric self-cleansing and controls the concentrations of greenhouse gases like methane and ozone. Due to tack of measurements, vertical distributions of HONO and its sources in the troposphere remain unclear. Here, we present a set of observations of HONO and its budget made onboard a Zeppelin airship. In a sunlit layer separated from Earth's surface processes by temperature inversion, we found high HONO concentrations providing evidence for a strong gas-phase source of HONO consuming nitrogen oxides and potentially hydrogen oxide radicals. The observed properties of this production process suggest that the generally assumed impact of HONO on the abundance of OH in the troposphere is substantially overestimated. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Missing Gas-Phase Source of HONO Inferred from Zeppelin Measurements in the Troposphere.
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  Data: <searchLink fieldCode="AR" term="%22Xin+Li%22">Xin Li</searchLink><br /><searchLink fieldCode="AR" term="%22Rohrer%2C+Franz%22">Rohrer, Franz</searchLink><br /><searchLink fieldCode="AR" term="%22Hofzumahaus%2C+Andreas%22">Hofzumahaus, Andreas</searchLink><br /><searchLink fieldCode="AR" term="%22Brauers%2C+Theo%22">Brauers, Theo</searchLink><br /><searchLink fieldCode="AR" term="%22Häseler%2C+Rolf%22">Häseler, Rolf</searchLink><br /><searchLink fieldCode="AR" term="%22Bohn%2C+Birger%22">Bohn, Birger</searchLink><br /><searchLink fieldCode="AR" term="%22Broch%2C+Sebastian%22">Broch, Sebastian</searchLink><br /><searchLink fieldCode="AR" term="%22Fuchs%2C+Hendrik%22">Fuchs, Hendrik</searchLink><br /><searchLink fieldCode="AR" term="%22Gomm%2C+Sebastian%22">Gomm, Sebastian</searchLink><br /><searchLink fieldCode="AR" term="%22Holland%2C+Frank%22">Holland, Frank</searchLink><br /><searchLink fieldCode="AR" term="%22Jäger%2C+Julia%22">Jäger, Julia</searchLink><br /><searchLink fieldCode="AR" term="%22Kaiser%2C+Jennifer%22">Kaiser, Jennifer</searchLink><br /><searchLink fieldCode="AR" term="%22Keutsch%2C+Frank+N%2E%22">Keutsch, Frank N.</searchLink><br /><searchLink fieldCode="AR" term="%22Lohse%2C+Insa%22">Lohse, Insa</searchLink><br /><searchLink fieldCode="AR" term="%22Keding+Lu%22">Keding Lu</searchLink><br /><searchLink fieldCode="AR" term="%22Tillmann%2C+Ralf%22">Tillmann, Ralf</searchLink><br /><searchLink fieldCode="AR" term="%22Wegener%2C+Robert%22">Wegener, Robert</searchLink><br /><searchLink fieldCode="AR" term="%22Wolfe%2C+Glenn+M%2E%22">Wolfe, Glenn M.</searchLink><br /><searchLink fieldCode="AR" term="%22Mentel%2C+Thomas+F%2E%22">Mentel, Thomas F.</searchLink><br /><searchLink fieldCode="AR" term="%22Kiendier-Scharr%2C+Astrid%22">Kiendier-Scharr, Astrid</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 4/18/2014, Vol. 344 Issue 6181, p292-296. 5p.
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  Data: Gaseous nitrous acid (HONO) is an important precursor of tropospheric hydroxyl radicals (OH). OH is responsible for atmospheric self-cleansing and controls the concentrations of greenhouse gases like methane and ozone. Due to tack of measurements, vertical distributions of HONO and its sources in the troposphere remain unclear. Here, we present a set of observations of HONO and its budget made onboard a Zeppelin airship. In a sunlit layer separated from Earth's surface processes by temperature inversion, we found high HONO concentrations providing evidence for a strong gas-phase source of HONO consuming nitrogen oxides and potentially hydrogen oxide radicals. The observed properties of this production process suggest that the generally assumed impact of HONO on the abundance of OH in the troposphere is substantially overestimated. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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