搜索结果: 1-13 共查到“海洋地球物理学 Evidence”相关记录13条 . 查询时间(0.125 秒)
Ice Keel Scour Marks on Mars:Evidence for Floating and Grounding Ice Floes in Kasei Valles
Ice Keel Scour Marks on Mars Floating and Grounding Ice Floes Kasei Valles
2015/7/31
We present new observations from analyses of Mars Global Surveyor Mars Orbiter Camera images of surficial Martian features interpreted to be the result of interactions between the keels of floating ic...
Ice Keel Scour Marks on Mars:Evidence for Floating and Grounding Ice Floes in Kasei Valles
Ice Keel Scour Marks on Mars Floating and Grounding Ice Floes Kasei Valles
2015/7/31
We present new observations from analyses of Mars Global Surveyor Mars Orbiter Camera images of surficial Martian features interpreted to be the result of interactions between the keels of floating ic...
Subarctic Cetaceans in the Southern Chukchi Sea: Evidence of Recovery or Response to a Changing Ecosystem
Production sea ice the bering strait tourism sea ice cover
2015/7/16
The southern Chukchi Sea is one of the most productive areas in the world ocean. Over the past decade, there have been dramatic changes in this region in sea ice cover and in Bering Strait inflow, and...
Evidence for the role of methane-derived carbon in a free-flowing, lowland river food web
a free-flowing methane-derived carbon
2014/4/17
We measured the d13
C values of dominant primary consumers and their potential food sources in a
groundwater-fed lowland river. The d13
C of most consumers, such as Gammarus and Simulium, reflected...
Large, non-Redfieldian drawdown of nutrients and carbon in the extratropical North Atlantic Ocean (46uN): Evidence for dinitrogen fixation?
non-Redfieldian drawdown of nutrients carbon
2014/4/21
Considerable drawdown of total dissolved inorganic carbon (CT) and oversaturation of oxygen (O2
) within a
cold (,15uC) oligotrophic eddy in the extratropical North Atlantic Ocean (46uN, 20.5uW) ind...
Experimental d13 C evidence for a contribution of methane to pelagic food webs in lakes
methane to pelagic food webs Experimental
2014/5/5
We tested the hypothesis that low stable carbon isotope (d13
C) values commonly observed for zooplankton in
humic lakes are due to their feeding on isotopically light methane-oxidizing microbes, and...
Long-term changes in the areal hypolimnetic oxygen deficit (AHOD) of Onondaga Lake: Evidence of sediment feedback
Long-term changes areal hypolimnetic oxygen
2014/4/30
Long-term trends in the rate of depletion of hypolimnetic dissolved oxygen (DO) are documented for ionically
enriched hypereutrophic Onondaga Lake, New York, for the 1978–2002 interval. Depletion rat...
Picophytoplankton cell death induced by UV radiation: Evidence for oceanic Atlantic communities
Picophytoplankton cell death induced oceanic Atlantic communities
2014/4/23
We analyzed the effect of ambient levels of visible and ultraviolet radiation (UVR) on picophytoplankton cell
death by exposing natural communities of picophytoplankton (Prochlorococcus, Synechococcu...
Spatial and temporal variability in factors affecting mesozooplankton dynamics in Chesapeake Bay: Evidence from biomass size spectra
Spatial and temporal variability factors affecting mesozooplankton dynamics
2014/4/23
Zooplankton biomass in Chesapeake Bay was estimated with an optical plankton counter mounted on a towed
body (Scanfish). Normalized zooplankton biomass size spectra were calculated for three Ba...
Cold intrusions in Lake Baikal: Direct observational evidence for deep water renewal
Cold intrusions in Lake Baikal Direct observational evidence deep water renewal
2014/5/8
We studied cold, deep-water intrusions in the South Basin of Lake Baikal on the basis of 2 yr of data (December 1995-November 1997) from near-bottom and near-surface thermistor strings, monthly conduc...
Haunted by the past: Evidence for dormant stage banks of microparasites and epibionts of Daphnia
Haunted microparasites epibionts
2014/5/16
Microparasites and epibionts have important implications for the ecology and evolution of their zooplankton host
populations. Many parasites and epibionts produce resistant spores that infect new hos...
Surface avoidance by freshwater zooplankton: Field evidence on the role of ultraviolet radiation
Surface avoidance freshwater zooplankton
2014/5/14
The avoidance of surface waters by crustacean zooplankton is a common phenomenon both in marine and
freshwaters. The contemporary paradigm interprets such behavior as an antipredator strategy. Howeve...
Nitrogen isotopic evidence for micronutrient control of fractional NO utilization in the 2 3 equatorial Pacific
fractional NO utilization Nitrogen isotopic evidence
2014/5/30
During the U.S. JGOFS EqPac program, variations in nitrogen isotopic ratio (d
15
N) and their control by relative
NO drawdown were examined in detail. Near-surface d
15
NO data clearly conform to...