Subseasonal Variation in Neptune’s Mid-infrared Emission
We present an analysis of all currently available ground-based imaging of Neptune in the mid-infrared. Dating between 2003 and 2020, the images reveal changes in Neptune’s mid-infrared (∼8–25 μm) emission over time in the years surrounding Neptune’s 2005 southern summer solstice. Images sensitive to...
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ftleicesterunfig:oai:figshare.com:article/26734786 2024-09-15T18:36:40+00:00 Subseasonal Variation in Neptune’s Mid-infrared Emission Michael T Roman Leigh Fletcher Glenn S Orton Thomas K Greathouse Julianne I Moses Naomi Rowe-Gurney Patrick GJ Irwin Arrate Antuñano James Sinclair Yasumasa Kasaba Takuya Fujiyoshi Imke de Pater Heidi B Hammel 2022-04-11T00:00:00Z https://figshare.com/articles/journal_contribution/Subseasonal_Variation_in_Neptune_s_Mid-infrared_Emission/26734786 unknown 2381/26734786.v1 https://figshare.com/articles/journal_contribution/Subseasonal_Variation_in_Neptune_s_Mid-infrared_Emission/26734786 CC BY 4.0 Astronomical sciences Space sciences Science & Technology Physical Sciences Astronomy & Astrophysics CLOUD STRUCTURE STRATOSPHERIC TEMPERATURE ATMOSPHERIC CIRCULATION PHOTOMETRIC VARIABILITY METHANE PHOTOCHEMISTRY EQUATORIAL OSCILLATION VERTICAL STRUCTURE UPPER TROPOSPHERE THERMAL STRUCTURE EPIC SIMULATIONS Text Journal contribution 2022 ftleicesterunfig 2024-09-01T23:33:31Z We present an analysis of all currently available ground-based imaging of Neptune in the mid-infrared. Dating between 2003 and 2020, the images reveal changes in Neptune’s mid-infrared (∼8–25 μm) emission over time in the years surrounding Neptune’s 2005 southern summer solstice. Images sensitive to stratospheric ethane (∼12 μm), methane (∼8 μm), and CH3D (∼9 μm) display significant subseasonal temporal variation on regional and global scales. Comparison with H2 S(1) hydrogen quadrupole (∼17.035 μm) spectra suggests that these changes are primarily related to stratospheric temperature changes. The stratosphere appears to have cooled between 2003 and 2009 across multiple filtered wavelengths, followed by a dramatic warming of the south pole between 2018 and 2020. Conversely, upper-tropospheric temperatures—inferred from ∼17 to 25 μm imaging—appear invariant during this period, except for the south pole, which appeared warmest between 2003 and 2006. We discuss the observed variability in the context of seasonal forcing, tropospheric meteorology, and the solar cycle. Collectively, these data provide the strongest evidence to date that processes produce subseasonal variation on both global and regional scales in Neptune’s stratosphere. Article in Journal/Newspaper South pole University of Leicester: Figshare |
institution |
Open Polar |
collection |
University of Leicester: Figshare |
op_collection_id |
ftleicesterunfig |
language |
unknown |
topic |
Astronomical sciences Space sciences Science & Technology Physical Sciences Astronomy & Astrophysics CLOUD STRUCTURE STRATOSPHERIC TEMPERATURE ATMOSPHERIC CIRCULATION PHOTOMETRIC VARIABILITY METHANE PHOTOCHEMISTRY EQUATORIAL OSCILLATION VERTICAL STRUCTURE UPPER TROPOSPHERE THERMAL STRUCTURE EPIC SIMULATIONS |
spellingShingle |
Astronomical sciences Space sciences Science & Technology Physical Sciences Astronomy & Astrophysics CLOUD STRUCTURE STRATOSPHERIC TEMPERATURE ATMOSPHERIC CIRCULATION PHOTOMETRIC VARIABILITY METHANE PHOTOCHEMISTRY EQUATORIAL OSCILLATION VERTICAL STRUCTURE UPPER TROPOSPHERE THERMAL STRUCTURE EPIC SIMULATIONS Michael T Roman Leigh Fletcher Glenn S Orton Thomas K Greathouse Julianne I Moses Naomi Rowe-Gurney Patrick GJ Irwin Arrate Antuñano James Sinclair Yasumasa Kasaba Takuya Fujiyoshi Imke de Pater Heidi B Hammel Subseasonal Variation in Neptune’s Mid-infrared Emission |
topic_facet |
Astronomical sciences Space sciences Science & Technology Physical Sciences Astronomy & Astrophysics CLOUD STRUCTURE STRATOSPHERIC TEMPERATURE ATMOSPHERIC CIRCULATION PHOTOMETRIC VARIABILITY METHANE PHOTOCHEMISTRY EQUATORIAL OSCILLATION VERTICAL STRUCTURE UPPER TROPOSPHERE THERMAL STRUCTURE EPIC SIMULATIONS |
description |
We present an analysis of all currently available ground-based imaging of Neptune in the mid-infrared. Dating between 2003 and 2020, the images reveal changes in Neptune’s mid-infrared (∼8–25 μm) emission over time in the years surrounding Neptune’s 2005 southern summer solstice. Images sensitive to stratospheric ethane (∼12 μm), methane (∼8 μm), and CH3D (∼9 μm) display significant subseasonal temporal variation on regional and global scales. Comparison with H2 S(1) hydrogen quadrupole (∼17.035 μm) spectra suggests that these changes are primarily related to stratospheric temperature changes. The stratosphere appears to have cooled between 2003 and 2009 across multiple filtered wavelengths, followed by a dramatic warming of the south pole between 2018 and 2020. Conversely, upper-tropospheric temperatures—inferred from ∼17 to 25 μm imaging—appear invariant during this period, except for the south pole, which appeared warmest between 2003 and 2006. We discuss the observed variability in the context of seasonal forcing, tropospheric meteorology, and the solar cycle. Collectively, these data provide the strongest evidence to date that processes produce subseasonal variation on both global and regional scales in Neptune’s stratosphere. |
format |
Article in Journal/Newspaper |
author |
Michael T Roman Leigh Fletcher Glenn S Orton Thomas K Greathouse Julianne I Moses Naomi Rowe-Gurney Patrick GJ Irwin Arrate Antuñano James Sinclair Yasumasa Kasaba Takuya Fujiyoshi Imke de Pater Heidi B Hammel |
author_facet |
Michael T Roman Leigh Fletcher Glenn S Orton Thomas K Greathouse Julianne I Moses Naomi Rowe-Gurney Patrick GJ Irwin Arrate Antuñano James Sinclair Yasumasa Kasaba Takuya Fujiyoshi Imke de Pater Heidi B Hammel |
author_sort |
Michael T Roman |
title |
Subseasonal Variation in Neptune’s Mid-infrared Emission |
title_short |
Subseasonal Variation in Neptune’s Mid-infrared Emission |
title_full |
Subseasonal Variation in Neptune’s Mid-infrared Emission |
title_fullStr |
Subseasonal Variation in Neptune’s Mid-infrared Emission |
title_full_unstemmed |
Subseasonal Variation in Neptune’s Mid-infrared Emission |
title_sort |
subseasonal variation in neptune’s mid-infrared emission |
publishDate |
2022 |
url |
https://figshare.com/articles/journal_contribution/Subseasonal_Variation_in_Neptune_s_Mid-infrared_Emission/26734786 |
genre |
South pole |
genre_facet |
South pole |
op_relation |
2381/26734786.v1 https://figshare.com/articles/journal_contribution/Subseasonal_Variation_in_Neptune_s_Mid-infrared_Emission/26734786 |
op_rights |
CC BY 4.0 |
_version_ |
1810480357119623168 |