Large Uncertainties in Estimation of Tropical Tropopause Temperature Variabilities Due to Model Vertical Resolution
Abstract Tropopause temperature (TPT) is a useful indicator and a key component of climate change. Well simulating its value and seasonal‐to‐decadal variability by climate models is still challenging. How the vertical resolution influences the representation of TPT and its response to a climate forc...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2019GL084112 |
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| author | Wuke Wang Ming Shangguan Wenshou Tian Torsten Schmidt Aijun Ding |
| author_facet | Wuke Wang Ming Shangguan Wenshou Tian Torsten Schmidt Aijun Ding |
| author_sort | Wuke Wang |
| collection | DOAJ |
| description | Abstract Tropopause temperature (TPT) is a useful indicator and a key component of climate change. Well simulating its value and seasonal‐to‐decadal variability by climate models is still challenging. How the vertical resolution influences the representation of TPT and its response to a climate forcing is largely unknown. This study investigates TPT responses to sea surface temperatures using a series of model simulations in various vertical resolution. With high vertical resolution (HV‐Res), the model gives a better representation of tropical TPTs in absolute values and seasonal variations. The corresponding changes in TPTs associated with sea surface temperature anomalies (El Niño–Southern Oscillation and Pacific Decadal Oscillation) are 30% stronger and more realistic in the HV‐Res model. Such improvements may get benefits from better representations of equatorial waves with more realistic structure and stronger interannual variations. A proper vertical resolution is therefore essential to well simulate the stratosphere‐troposphere coupling and should be used in climate change assessment. |
| format | Article |
| id | doaj-art-8b4c435d55c94530a3d0ffdfad974d62 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2019-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-8b4c435d55c94530a3d0ffdfad974d622025-08-20T03:13:22ZengWileyGeophysical Research Letters0094-82761944-80072019-08-014616100431005210.1029/2019GL084112Large Uncertainties in Estimation of Tropical Tropopause Temperature Variabilities Due to Model Vertical ResolutionWuke Wang0Ming Shangguan1Wenshou Tian2Torsten Schmidt3Aijun Ding4Joint International Research Laboratory of Atmospheric and Earth System Sciences (JirLATEST), School of Atmospheric Sciences Nanjing University Nanjing ChinaSchool of Transportation Southeast University Nanjing ChinaCollege of Atmospheric Sciences Lanzhou University Lanzhou ChinaHelmholtz Centre Potsdam GFZ German Research Centre for Geosciences Potsdam GermanyJoint International Research Laboratory of Atmospheric and Earth System Sciences (JirLATEST), School of Atmospheric Sciences Nanjing University Nanjing ChinaAbstract Tropopause temperature (TPT) is a useful indicator and a key component of climate change. Well simulating its value and seasonal‐to‐decadal variability by climate models is still challenging. How the vertical resolution influences the representation of TPT and its response to a climate forcing is largely unknown. This study investigates TPT responses to sea surface temperatures using a series of model simulations in various vertical resolution. With high vertical resolution (HV‐Res), the model gives a better representation of tropical TPTs in absolute values and seasonal variations. The corresponding changes in TPTs associated with sea surface temperature anomalies (El Niño–Southern Oscillation and Pacific Decadal Oscillation) are 30% stronger and more realistic in the HV‐Res model. Such improvements may get benefits from better representations of equatorial waves with more realistic structure and stronger interannual variations. A proper vertical resolution is therefore essential to well simulate the stratosphere‐troposphere coupling and should be used in climate change assessment.https://doi.org/10.1029/2019GL084112tropopause temperaturevertical resolutioninterannual‐to‐decadal variability |
| spellingShingle | Wuke Wang Ming Shangguan Wenshou Tian Torsten Schmidt Aijun Ding Large Uncertainties in Estimation of Tropical Tropopause Temperature Variabilities Due to Model Vertical Resolution Geophysical Research Letters tropopause temperature vertical resolution interannual‐to‐decadal variability |
| title | Large Uncertainties in Estimation of Tropical Tropopause Temperature Variabilities Due to Model Vertical Resolution |
| title_full | Large Uncertainties in Estimation of Tropical Tropopause Temperature Variabilities Due to Model Vertical Resolution |
| title_fullStr | Large Uncertainties in Estimation of Tropical Tropopause Temperature Variabilities Due to Model Vertical Resolution |
| title_full_unstemmed | Large Uncertainties in Estimation of Tropical Tropopause Temperature Variabilities Due to Model Vertical Resolution |
| title_short | Large Uncertainties in Estimation of Tropical Tropopause Temperature Variabilities Due to Model Vertical Resolution |
| title_sort | large uncertainties in estimation of tropical tropopause temperature variabilities due to model vertical resolution |
| topic | tropopause temperature vertical resolution interannual‐to‐decadal variability |
| url | https://doi.org/10.1029/2019GL084112 |
| work_keys_str_mv | AT wukewang largeuncertaintiesinestimationoftropicaltropopausetemperaturevariabilitiesduetomodelverticalresolution AT mingshangguan largeuncertaintiesinestimationoftropicaltropopausetemperaturevariabilitiesduetomodelverticalresolution AT wenshoutian largeuncertaintiesinestimationoftropicaltropopausetemperaturevariabilitiesduetomodelverticalresolution AT torstenschmidt largeuncertaintiesinestimationoftropicaltropopausetemperaturevariabilitiesduetomodelverticalresolution AT aijunding largeuncertaintiesinestimationoftropicaltropopausetemperaturevariabilitiesduetomodelverticalresolution |