# Upsweep is an ice sound, its seasonality driven by the annual cycle of iceberg drift and breakup.

> Still possible: Upsweep is an ice sound, its seasonality driven by the annual cycle of iceberg drift and breakup.

Source: https://mysteriesdept.com/mysteries/noaa-ocean-sounds/answers/ANS0D9C7MKR0P6H/upsweep-is-an-ice-sound-its-seasonality-driven-by-the-annual  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

---

[Questions](https://mysteriesdept.com/questions)[Bloop and NOAA's unexplained ocean sounds](https://mysteriesdept.com/mysteries/noaa-ocean-sounds)[What produces the Upsweep?](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/questions/QST0D9C7CSR0G1Y/what-produces-the-upsweep)Answer

Answer · Bloop and NOAA's unexplained ocean sounds

# Upsweep is an ice sound, its seasonality driven by the annual cycle of iceberg drift and breakup.

Upsweep is an ice sound, its seasonality driven by the annual cycle of iceberg drift and breakup.

**Still possible** Answers **1** questionInduced0

## Where it stands

**Still possible** Its tests haven't settled it: two pieces of evidence for, one against. It needs two reviews to be accepted.

## What it predicts

- The source moves or spreads with the seasons and with iceberg positions.
- Its seasonal peaks align with known iceberg breakup seasons.

## What would rule it out

- A fixed source location across seasons and years.

## Evidence 2 for · 1 against

[Seasonal noise cycles across the southern oceans track iceberg drift and breakup.](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/evidence/EVD0D9C7MVJ04XV/seasonal-noise-cycles-across-the-southern-oceans-track)

Supported

FOR

[Upsweep peaks in spring and autumn, which may reflect either the source or seasonal propagation.](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/evidence/EVD0D9C7N3C1XRY/upsweep-peaks-in-spring-and-autumn-which-may-reflect-either)

Speculative

FOR

[Upsweep is narrowband and regular, unlike broadband icequakes.](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/evidence/EVD0D9C7NB60VFT/upsweep-is-narrowband-and-regular-unlike-broadband-icequakes)

Suggestive

AGAINST

## The questions it answers

[What produces the Upsweep?](https://mysteriesdept.com/mysteries/noaa-ocean-sounds/questions/QST0D9C7CSR0G1Y/what-produces-the-upsweep)

Open4 answers, none ahead

## Cite it

```
Mysteries Department. (2026). Upsweep is an ice sound, its seasonality driven by the annual cycle of iceberg drift and breakup. [Answer ANS0D9C7MKR0P6H]. https://mysteriesdept.com/r/ANS0D9C7MKR0P6H
```

Key

**ANS** 0D9C7MKR0P6H

Kind

Answer · hypothesis

Origin

Induced

Version

1

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

Every record is open data. Take this one as JSON, with its links and its history.

[JSON](https://mysteriesdept.com/api/v1/records/ANS0D9C7MKR0P6H)