Give me a list of the scientists named in the article, including their names and positions.

Article:
Starting in late June 2021, daytime temperatures at some spots in the Pacific Northwest reached nearly 50° C (or about 122° Fahrenheit). The extreme heat caused wildfires to rage and boosted the rates of heat-related deaths in the region, says Karen Heeter, a dendrochronologist at Columbia University’s Lamont-Doherty Earth Observatory in Palisades, N.Y.

To see how the record-setting summer temperatures stacked up against those in years before meteorologists compiled weather data, Heeter and her colleagues looked at tree ring samples collected from dozens of trees at 17 sites in the Pacific Northwest. The core samples were taken from living trees between the early 1990s and 2021. Two of the core samples chronicled temperatures as far back as the year 950, the team found.

The team measured the widths and densities of the portions of tree rings that had formed in summer months. Generally for conifers in the Pacific Northwest, the warmer the growing season temperature, the wider the tree ring and the denser the wood formed during that period. By statistically blending data from the 17 sites, the team created a year-by-year profile of the entire region’s average summertime temperatures from 950 through 2021.

Tree ring temps
Tree ring data from the Pacific Northwest let researchers reconstruct the year-to-year average summer temperature in the region from 950 to 2021. This graph shows the distribution of those temperatures relative to the 1951–1980 global summer average. Summertime temperatures for most of the years fell within a degree of that long-term average. But at roughly 3.6 degrees Celsius warmer, the summer of 2021 (arrow) stands out — hotter than any summer in the past millennium.

Distribution of Pacific Northwest temperature anomalies, 950–2021

E. OTWELL
SOURCE: K.J. HEETER ET AL/NPJ CLIMATE AND ATMOSPHERIC SCIENCE 2023
Evidence of 2021’s record heat in the Pacific Northwest doesn’t come as a surprise to Bryan Black, a dendrochronologist at the University of Arizona in Tucson. As he conducted field work in the area that summer, he noticed that many of the region’s trees showed a notable browning on their southwestern sides, which would have borne the brutal brunt of afternoon sunshine.

“The tree scorch was shocking,” says Black, who was not part of the new study. The average summer temperatures “were extraordinarily away from the norm.”

That anomaly, says Lauren Stachowiak, a geographer at Eastern Washington University in Cheney who studies tree rings and lived in the area at the time, will undoubtedly show up in tree ring samples obtained in future studies.
system
mujhe lekh main namit vaigyanikon kii ek suchi den, jisamen unke naam or pad shaamil hai.

lekh:
june 2021 ke ant main shuru hokar, prashanth northwest main kuch sthanon par din kaa taapmaana lagbhag 50 ° C (yaa lagbhag 122 ° farenheit) tak pahunch gaya.atyadhik garmi ne jangal kii aag ko badha diya or is kshetra main garmi se sambandhit mauton kii daron ko badhaayaa or badhaayaa, karen heater, colombia vishvavidhyalay ke lamont-doharty arth obserwetary main ek dendrochronologist, polisads, en.vaai.

yah dekhne ke liye ki mausam vigyaniyon ne mausam ke aankadon ko sankalit karne se pehle varshon main un logon ke khilaaf record-setting garmiyon kaa taapmaana kaise khadi ho gai, heater or unke sahyogiyon ne pacific northwest main 17 citon par darjanon pedo se ekatra kiye gaye tree ring ke namoonon ko dekha.1990 ke dashak kii shuruyaat or 2021 ke bich jivit pedo se mukhya namoonon ko liya gaya tha. do kor namoonon main se do ne taapmaana ko chronic kiya tha, jahaan tak ki varsh 950 ke rup main peeche tha.

team ne garmiyon ke maheenon main gathit ped ke challe ke kuch hisson kii chaudaai or ghanatv ko mapa.aam taur par prashanth northwest main conifers ke liye, badhate mausam kaa taapmaana garm hota he, ped kii anguthi or us avadhi ke dauraan lakdi kaa gathan hota he.17 citon se sankhyikeey rup se sammishran data dwaara, team ne 2021 tak 950 se puure kshetra ke ausat garmiyon ke taapmaana kaa ek saal-dar-varsh profil banaaya.

tree ring temps
prashanth northwest ke tree ring data ne shodhakartaaon ko 950 se 2021 tak is kshetra main varsh-dar-varsh ausat garmiyon ke taapmaana ko phir se sangathit karne diya. yah graph 1951-1980 vaishvik greeshmakaleen ausat ke saapeksh un taapamanon ke vitaran ko darshata he.adhikansh varshon ke liye garmiyon kaa taapmaana us dirghakaalik ausat kii degree ke bheetar gir gaya.lekin lagbhag 3.6 degree celsius warmar main, 2021 kii garmiyon (tir) baahar khadaa he - pichley milinium main kisi bhi garmi kii tulana main garm.

prashanth northwest taapmaana visangatiyon kaa vitaran, 950–2021

i. otwel
strot: ke.je.heater at al/enpije jalwaayu or vayumandaleey vigyaan 2023
pacific northwest main 2021 ke record hit ke sakshya bryan blike ke liye ek aashcharya ke rup main nahin aate hai, jo takson main erizona vishvavidhyalay main ek dendrochronologist hai.jaisaa ki unhone us garmi main is kshetra main kshetra kaa kaam kiya, unhone dekha ki is kshetra ke kai pedo ne apane dakshin -pashchimi kinaaron par ek ullekhneey browning dikhaai, jo dopaher kii dhoop ke krur khamiya ko janm detii thi.

blike kehete hai, "tree scorch chaunkaane vaala tha," blike kehete hai, jo nae adhyayan kaa hissaa nahin tha.ausat garmiyon kaa taapmaana "maandand se asaadhaaran rup se dur tha."

us visangati, cheni ke purvi washington vishvavidhyalay ke ek bhugolveri lauren stachoviak kaa kahana he, jo ped ke challe kaa adhyayan karte hai or us samay kshetra main rahete the, nihsandeh bhavishya ke adhyayanon main praapt ped kii anguthi ke namoonon main dikhaai denge.
user
- karen heater, dendrochronologist
- bryan blike, dendrochronologist
- lauren stachoviak, bhugolvetta
assistant
<|system|>
</s>
<|user|>
mujhe lekh main namit vaigyanikon kii ek suchi den, jisamen unke naam or pad shaamil hai.

lekh:
june 2021 ke ant main shuru hokar, prashanth northwest main kuch sthanon par din kaa taapmaana lagbhag 50 ° C (yaa lagbhag 122 ° farenheit) tak pahunch gaya.atyadhik garmi ne jangal kii aag ko badha diya or is kshetra main garmi se sambandhit mauton kii daron ko badhaayaa or badhaayaa, karen heater, colombia vishvavidhyalay ke lamont-doharty arth obserwetary main ek dendrochronologist, polisads, en.vaai.

yah dekhne ke liye ki mausam vigyaniyon ne mausam ke aankadon ko sankalit karne se pehle varshon main un logon ke khilaaf record-setting garmiyon kaa taapmaana kaise khadi ho gai, heater or unke sahyogiyon ne pacific northwest main 17 citon par darjanon pedo se ekatra kiye gaye tree ring ke namoonon ko dekha.1990 ke dashak kii shuruyaat or 2021 ke bich jivit pedo se mukhya namoonon ko liya gaya tha. do kor namoonon main se do ne taapmaana ko chronic kiya tha, jahaan tak ki varsh 950 ke rup main peeche tha.

team ne garmiyon ke maheenon main gathit ped ke challe ke kuch hisson kii chaudaai or ghanatv ko mapa.aam taur par prashanth northwest main conifers ke liye, badhate mausam kaa taapmaana garm hota he, ped kii anguthi or us avadhi ke dauraan lakdi kaa gathan hota he.17 citon se sankhyikeey rup se sammishran data dwaara, team ne 2021 tak 950 se puure kshetra ke ausat garmiyon ke taapmaana kaa ek saal-dar-varsh profil banaaya.

tree ring temps
prashanth northwest ke tree ring data ne shodhakartaaon ko 950 se 2021 tak is kshetra main varsh-dar-varsh ausat garmiyon ke taapmaana ko phir se sangathit karne diya. yah graph 1951-1980 vaishvik greeshmakaleen ausat ke saapeksh un taapamanon ke vitaran ko darshata he.adhikansh varshon ke liye garmiyon kaa taapmaana us dirghakaalik ausat kii degree ke bheetar gir gaya.lekin lagbhag 3.6 degree celsius warmar main, 2021 kii garmiyon (tir) baahar khadaa he - pichley milinium main kisi bhi garmi kii tulana main garm.

prashanth northwest taapmaana visangatiyon kaa vitaran, 950–2021

i. otwel
strot: ke.je.heater at al/enpije jalwaayu or vayumandaleey vigyaan 2023
pacific northwest main 2021 ke record hit ke sakshya bryan blike ke liye ek aashcharya ke rup main nahin aate hai, jo takson main erizona vishvavidhyalay main ek dendrochronologist hai.jaisaa ki unhone us garmi main is kshetra main kshetra kaa kaam kiya, unhone dekha ki is kshetra ke kai pedo ne apane dakshin -pashchimi kinaaron par ek ullekhneey browning dikhaai, jo dopaher kii dhoop ke krur khamiya ko janm detii thi.

blike kehete hai, "tree scorch chaunkaane vaala tha," blike kehete hai, jo nae adhyayan kaa hissaa nahin tha.ausat garmiyon kaa taapmaana "maandand se asaadhaaran rup se dur tha."

us visangati, cheni ke purvi washington vishvavidhyalay ke ek bhugolveri lauren stachoviak kaa kahana he, jo ped ke challe kaa adhyayan karte hai or us samay kshetra main rahete the, nihsandeh bhavishya ke adhyayanon main praapt ped kii anguthi ke namoonon main dikhaai denge.</s>
<|assistant|>
- karen heater, dendrochronologist
- bryan blike, dendrochronologist
- lauren stachoviak, bhugolvetta</s>
