Oxygen and hydrogen isotopic variations between adjacent drips in three caves at increasing elevation in a temperate coastal rainforest, Vancouver Island, Canada

Beddows, Patricia A; Mandić, Magda; Ford, Derek C.; Schwarcz, Henry P.

doi:10.1016/j.gca.2015.08.017

Cited by 20 publications

(14 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The observed drip water ∆δ 18 O/100 m gradient is −0.15% (Figure 10), comparable to steep north Italian Alps where two transects had gradient of −0.15% and −0.08% [81]. It is also similar to a steep coastal area on Vancouver Island where the drip water gradient was −0.16% [72] and the western flank of Mount-Lebanon where it was −0.2% [82]. However, MP and ZB sites, as mentioned above, may not be the best representatives for general conclusions on the altitudinal effect on drip water due to their specific settings, but it is indicative that the drip water gradient is attenuated according to precipitation gradient.…”

Section: Preservation Of Altitude and Latitude Effects In Drip Watersupporting

confidence: 58%

“…When reconstructing multi-annual environmental changes using slow-growing stalagmites, one of the first issues to consider when interpreting particular drip water isotopic signals is the homogenization of the meteoric water during its transition through the epikarst towards the drip site, to ensure that the recorded speleothem δ 18 O signal is not seasonally biased. Homogenization of the drip water, i.e., removal of the seasonal signal of precipitation, had been initially taken as a rule [69], but it has since been realized that it must be considered as a site-specific process which is not always achieved, sometimes not even within the same cave [9,25,[70][71][72]. As presented in Table 2, seasonal variations of rainwater δ 18 O (amplitudes from 4.5% to 8.9% ) and δ 2 H (amplitudes from 27.4% to 68.9% ) show some geographical/climate related distribution, being smaller in southern and coastal regions, while the northern and continental sites receive precipitation with a wider isotopic range.…”

Section: Precipitation-discharge Relationship and Drip Water Homogenizationmentioning

confidence: 99%

See 1 more Smart Citation

Stable Isotope Hydrology of Cave Groundwater and Its Relevance for Speleothem-Based Paleoenvironmental Reconstruction in Croatia

Surić

Czuppon

Lončarić

et al. 2020

Water

View full text Add to dashboard Cite

Speleothems deposited from cave drip waters retain, in their calcite lattice, isotopic records of past environmental changes. Among other proxies, δ18O is recognized as very useful for this purpose, but its accurate interpretation depends on understanding the relationship between precipitation and drip water δ18O, a relationship controlled by climatic settings. We analyzed water isotope data of 17 caves from different latitudes and altitudes in relatively small but diverse Croatian karst regions in order to distinguish the dominant influences. Drip water δ18O in colder caves generally shows a greater resemblance to the amount-weighted mean of precipitation δ18O compared to warmer sites, where evaporation plays an important role. However, during glacial periods, today’s ‘warm’ sites were cold, changing the cave characteristics and precipitation δ18O transmission patterns. Superimposed on these settings, each cave has site-specific features, such as morphology (descending or ascending passages), altitude and infiltration elevation, (micro) location (rain shadow or seaward orientation), aquifer architecture (responsible for the drip water homogenization) and cave atmosphere (governing equilibrium or kinetic fractionation). This necessitates an individual approach and thorough monitoring for best comprehension.

show abstract

Section: Preservation Of Altitude and Latitude Effects In Drip Watersupporting

confidence: 58%

Section: Precipitation-discharge Relationship and Drip Water Homogenizationmentioning

confidence: 99%

Stable Isotope Hydrology of Cave Groundwater and Its Relevance for Speleothem-Based Paleoenvironmental Reconstruction in Croatia

Surić

Czuppon

Lončarić

et al. 2020

Water

View full text Add to dashboard Cite

show abstract

“…Some sites were instrumented with surface meteorological equipment designed for relatively large fluxes. Scale mismatch and large power requirements spurred the development of custom monitoring solutions [ 39 ], with new instruments like the ~£300 “Stalagmate” drip counter by Driptych providing quality field data for a number of drip monitoring projects [ 40 , 41 , 42 ]. An inexpensive open-source alternative, suitable for use in caves with a range of sensors would facilitate larger installations.…”

Section: Case Study 1—monitoring Vadose Zone Hydrology Using Drip mentioning

confidence: 99%

Cave Pearl Data Logger: A Flexible Arduino-Based Logging Platform for Long-Term Monitoring in Harsh Environments

Beddows

Mallon

2018

Sensors

Self Cite

View full text Add to dashboard Cite

A low-cost data logging platform is presented that provides long-term operation in remote or submerged environments. Three premade “breakout boards” from the open-source Arduino ecosystem are assembled into the core of the data logger. Power optimization techniques are presented which extend the operational life of this module-based design to >1 year on three alkaline AA batteries. Robust underwater housings are constructed for these loggers using PVC fittings. Both the logging platform and the enclosures, are easy to build and modify without specialized tools or a significant background in electronics. This combination turns the Cave Pearl data logger into a generalized prototyping system and this design flexibility is demonstrated with two field studies recording drip rates in a cave and water flow in a flooded cave system. This paper describes a complete DIY solution, suitable for a wide range of challenging deployment conditions.

show abstract

“…Along the west coast, observations of precipitation on the seasonal to event scale point to a seasonal signal in water isotope ratios with summer rain characterized by higher isotope ratios and winter rain characterized by lower isotope ratios (Vachon et al, 2010;Ersek et al, 2010;Oster et al, 2012). This seasonal signal has also been observed in cave drip waters in near-coastal environments (Oster et al, 2012;Beddows et al, 2015). Analyses of rain and snow isotopes along the coast from central to southern California indicate that moisture source plays a dominant role in determining precipitation isotopic ratios, with subtropical and tropical Pacific sourced moisture leading to precipitation with higher isotope ratios and mid-latitude and north Pacific sourced moisture leading to lower isotope ratios (Friedman et al, 2002;Berkelhammer et al, 2012).…”

Section: Controls On Speleothem δ 18 O Variability In Wnamentioning

confidence: 94%

Tracking regional and global teleconnections recorded by western North American speleothem records

Oster

Kelley

2016

Quaternary Science Reviews

View full text Add to dashboard Cite

Speleothem proxy records are useful for interrogating past climates in the low and mid-latitudes given their ability to provide continuous, high-resolution, and long-lived records that can be dated with high precision. Several speleothem oxygen isotope records from western North America have recently been developed that highlight the importance of this archive in documenting past changes in atmospheric circulation. Taken individually, these records hint at teleconnections between western North American hydroclimate and climate changes in the high northern latitudes and tropics. However, there has been no systematic investigation of global climate teleconnections to this region that draws upon the body of North American speleothem records as a whole. Here we review the dominant controls on precipitation oxygen isotopes across the region, and conduct statistical comparisons and network visualizations of high-resolution speleothem oxygen isotope records from western North America to investigate the regional response to pronounced climate changes of the last deglaciation and to determine the pattern of global teleconnections to this region. We find that most western North American speleothem oxygen isotope records demonstrate a robust and consistent response to the events of the last deglaciation, despite differing controls on the oxygen isotope ratio of precipitation across the region. One record that receives a strong influence from the Gulf of Mexico exhibits a contrasting pattern in oxygen isotopes relative to most of the other records, which are dominated by westerly storms generated in the Pacific. During the studied interval, major shifts in Western North American speleothem records appear broadly synchronous or at least within the typical uncertainty of age models. We also find strong statistical linkages between

show abstract

Oxygen and hydrogen isotopic variations between adjacent drips in three caves at increasing elevation in a temperate coastal rainforest, Vancouver Island, Canada

Cited by 20 publications

References 46 publications

Stable Isotope Hydrology of Cave Groundwater and Its Relevance for Speleothem-Based Paleoenvironmental Reconstruction in Croatia

Stable Isotope Hydrology of Cave Groundwater and Its Relevance for Speleothem-Based Paleoenvironmental Reconstruction in Croatia

Cave Pearl Data Logger: A Flexible Arduino-Based Logging Platform for Long-Term Monitoring in Harsh Environments

Tracking regional and global teleconnections recorded by western North American speleothem records

Contact Info

Product

Resources

About