at sea level

USAGE SUMMARY

"at sea level" is correct and usable in written English.
You can use it to refer to a place or environment where the altitude is 0 meters or 0 feet above sea level. For example: "The air pressure at sea level is lower than at higher altitudes."

✓ Grammatically correct

News & Media

Science

Human-verified examples from authoritative sources

Exact Expressions

57 human-written examples

And his church is at sea level.

The New York Times - Sports

"The miners were at sea level.

The New York Times

At sea level, it's anybody's guess.

The Guardian

I'd rather drink at sea level.

The Guardian

Back at sea level, the perspective is always the same.

The Guardian

Guyana's capital, Georgetown, is right at sea level.

The New York Times

Oxygen is one-third what it is at sea level".

The New York Times

You are at sea level, dark-headed lover, Twelve hundred….

The New Yorker

He debated at sea level — what was his excuse?

The New York Times

"We are playing at sea level now and then it reacts normally," the Liverpool player said.

The Guardian - Sport

"To run a plasma jet at sea level is completely prohibitive," Dr. Bering said.

The New York Times

Expert writing Tips

Best practice

When discussing physical or physiological effects, specify "at sea level" to provide a clear baseline for comparison, especially when contrasting with higher altitudes. For instance, "Oxygen levels are significantly higher at sea level than in mountainous regions."

Common error

Avoid using "at sea level" without a clear point of comparison. For example, saying "Performance is better at sea level" is incomplete; specify what it is better than, such as "Performance is better at sea level than at high altitude".

Linguistic Context

The phrase "at sea level" functions primarily as an adverbial phrase, modifying verbs or clauses to specify the location or condition being described. As Ludwig AI confirms, it is correct and usable. It sets a spatial reference point in descriptions or comparisons, such as in discussions of air pressure or athletic performance.

Expression frequency: Very common

Frequent in

Science

41%

News & Media

41%

Wiki

3%

Less common in

Formal & Business

0%

Encyclopedias

0%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "at sea level" is a prepositional phrase denoting a standard reference point of zero altitude, widely used across scientific, news, and general contexts. As Ludwig AI indicates, its usage is grammatically correct and serves to establish a baseline for comparisons, especially when contrasting conditions or performance at different altitudes. When using this phrase, ensure it is part of a comparative statement for clarity. The phrase appears most frequently in "Science" and "News & Media" sources. Therefore, understanding and applying these guidelines will improve clarity and precision in your writing.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

at an elevation of zero meters

Explicitly states the altitude in metric units.

at an altitude of zero feet

Explicitly states the altitude in imperial units.

mean sea level

Refers to the average height of the sea's surface, used as a reference point.

zero altitude

This phrase uses a more technical term to describe the altitude.

at the coast

Focuses on the proximity to the sea, implying a low elevation.

at the shoreline

Emphasizes the immediate border between land and sea.

on the tideline

Specific to the area affected by tides, implying sea level.

at the water's edge

Describes location right by the sea, implying minimal elevation.

on the beach

Specifies a coastal environment, typically at or very near sea level.

at ground level

Indicates being at the base elevation, though not exclusively maritime.

FAQs

How is "at sea level" used in scientific contexts?

In scientific studies, "at sea level" serves as a baseline measurement for variables like atmospheric pressure, oxygen concentration, and physiological responses, providing a standardized reference for comparisons with data collected at different altitudes or conditions.

What does it mean when a location is described as "at sea level"?

Describing a location as "at sea level" means that its altitude is approximately zero meters (or feet) relative to the average height of the sea's surface. This is often used as a standard reference point for measuring elevation.

What are some synonyms for "at sea level"?

While there isn't a direct synonym, you can use phrases such as "zero altitude", "coastal area", or "shoreline" depending on the specific context. The phrase "mean sea level" is also a related technical term.

Why is training or performing "at sea level" significant for athletes?

Training or performing "at sea level" is significant because the higher oxygen concentration allows for optimal performance and recovery. Athletes often train at high altitudes to improve endurance, then return to compete at sea level where they can leverage the increased oxygen availability.