# The absorption is mesospheric sulphur dioxide above 80 km.

> Disputed: The absorption is mesospheric sulphur dioxide above 80 km.

Source: https://mysteriesdept.com/mysteries/venus-phosphine/answers/ANS0CQY20B87QNB/the-absorption-is-mesospheric-sulphur-dioxide-above-80-km  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Questions](https://mysteriesdept.com/questions)[Phosphine in the clouds of Venus](https://mysteriesdept.com/mysteries/venus-phosphine)[If the line is real, is it phosphine or sulphur dioxide?](https://mysteriesdept.com/mysteries/venus-phosphine/questions/QST0CQY1TQJ1W8Q/if-the-line-is-real-is-it-phosphine-or-sulphur-dioxide)Answer

Answer · Phosphine in the clouds of Venus

# The absorption is mesospheric sulphur dioxide above 80 km.

The absorption is mesospheric sulphur dioxide above 80 km.

**Disputed** Answers **1** questionPublished0

## Where it stands

**Disputed** One piece of evidence for, one against. It needs two reviews to be accepted.

## What it predicts

- A typical SO2 profile reproduces the JCMT line; SO2's reference line is diluted in ALMA data.
- The feature varies with SO2 abundance.

## What would rule it out

- Simultaneous SO2 measurements too low to produce the feature.

## Evidence 1 for · 1 against

[Radiative transfer shows typical mesospheric SO2 fits the JCMT feature and the line forms above 80 km.](https://mysteriesdept.com/mysteries/venus-phosphine/evidence/EVD0CQY20K2552X/radiative-transfer-shows-typical-mesospheric-so2-fits-the)

Supported

FOR

[A JCMT SO2 spectrum within days of the 2017 data and simultaneous ALMA SO2 imply low contamination.](https://mysteriesdept.com/mysteries/venus-phosphine/evidence/EVD0CQY20TW1ERZ/a-jcmt-so2-spectrum-within-days-of-the-2017-data-and)

Suggestive

AGAINST

## The questions it answers

[If the line is real, is it phosphine or sulphur dioxide?](https://mysteriesdept.com/mysteries/venus-phosphine/questions/QST0CQY1TQJ1W8Q/if-the-line-is-real-is-it-phosphine-or-sulphur-dioxide)

Part of [Is there a real absorption line at 266.94 GHz in the Venus spectra?](https://mysteriesdept.com/mysteries/venus-phosphine/questions/QST0CQY1TFR14XV/is-there-a-real-absorption-line-at-266-94-ghz-in-the-venus)

Open3 answers, none ahead

## Cite it

```
Mysteries Department. (2026). The absorption is mesospheric sulphur dioxide above 80 km. [Answer ANS0CQY20B87QNB]. https://mysteriesdept.com/r/ANS0CQY20B87QNB
```

Key

**ANS** 0CQY20B87QNB

Kind

Answer · hypothesis

Origin

Published

Version

1

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